2,184
(1,000)

The Orange Box

4.3 from 8890 votes
 

80,696 tracked gamers have this game, 1,948 have completed it (2.41%) | 372 want to boost

There are a maximum of 99 The Orange Box achievements worth 2,184 (1,000)

Gr33nEggsNSpam
78%

Gr33nEggsNSpam1,252 (700)

First played Thursday, 16 September 2010

77 achievements out of 99 won

View achievements as list The Orange Box Achievements

All achievements Achievements they've won Achievements they've not won
Acid Reflex

View guide to getting this achievementAcid Reflex8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill an acid antlion worker.

Flamethrower

View guide to getting this achievementFlamethrower12 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Set five enemies on fire in 30 seconds.

Long Jump

View guide to getting this achievementLong Jump9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Jump 300 feet.

Hardcore

View guide to getting this achievementHardcore47 (15)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other playersCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Accumulate 1000 total kills.

Secret Achievement

View guide to getting this achievementSecret Achievement38 (25)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Think Fast!

View guide to getting this achievementThink Fast!16 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill an Elite Soldier with his own energy ball.

Atomizer

View guide to getting this achievementAtomizer17 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Disintegrate 15 soldiers by throwing them into a Combine ball field.

Giant Killer

View guide to getting this achievementGiant Killer15 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Survive the rooftop strider battle in the ruins of City 17.

Fight the Power

View guide to getting this achievementFight the Power15 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Shut down the supression device by disabling its generators.

Plaza Defender

View guide to getting this achievementPlaza Defender15 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Survive the generator plaza standoff in chapter Anticitizen One.

"Radiation Levels Detected"

View guide to getting this achievement"Radiation Levels Detected"7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Get through the toxic tunnel under City 17 in Half-Life 2.

Deadly Harvest

View guide to getting this achievementDeadly Harvest7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill an enemy by planting a hopper mine.

Follow Freeman

View guide to getting this achievementFollow Freeman15 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Gain command of a squad of rebels in the uprising.

Warden Freeman

View guide to getting this achievementWarden Freeman15 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Survive the second turret standoff in Nova Prospekt.

One Man Army

View guide to getting this achievementOne Man Army8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMissable - This achievement will require starting a new save file if the opportunity to obtain it is missed
Destroy six gunships in Half-Life 2.

Bug Hunt

View guide to getting this achievementBug Hunt14 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Use the antlions to kill 50 enemies.

Lambda Locator

View guide to getting this achievementLambda Locator49 (15)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCollectable - This achievement is obtained by exploring the game environment to find a set of unique objects
Find all lambda caches in Half-Life 2.

Team Doctor

View guide to getting this achievementTeam Doctor12 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other playersCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Accumulate 25000 heal points as a Medic.

Pacifist

View guide to getting this achievementPacifist22 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Contain the Citadel core without killing any stalkers.

The One Free Bullet

View guide to getting this achievementThe One Free Bullet88 (40)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMissable - This achievement will require starting a new save file if the opportunity to obtain it is missed
Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!

Escape From City 17

View guide to getting this achievementEscape From City 1731 (20)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Escape City 17 with Alyx.

Citizen Escort

View guide to getting this achievementCitizen Escort27 (15)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Don't let any citizens die when escorting them to the escape train.

Attica!

View guide to getting this achievementAttica!8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Destroy the gunship in the hospital attic.

Live Bait

View guide to getting this achievementLive Bait16 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Help Alyx snipe 30 enemies in Episode One.

Elevator Action

View guide to getting this achievementElevator Action15 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Survive long enough to get on the parking garage elevator.

Zombie-que

View guide to getting this achievementZombie-que13 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Use flares to light 15 zombies on fire.

Grave Robber

View guide to getting this achievementGrave Robber8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Steal a Zombine's grenade.

Car Crusher

View guide to getting this achievementCar Crusher9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Use the cars to squash 15 antlions in Episode One.

Containment

View guide to getting this achievementContainment7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Contain the Citadel core.

Watch Your Head!

View guide to getting this achievementWatch Your Head!7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Make it to the bottom of the Citadel's main elevator shaft in one piece.

Counter-Sniper

View guide to getting this achievementCounter-Sniper10 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill all of the snipers in City 17.

Flushed

View guide to getting this achievementFlushed9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill an enemy with a toilet.

Conservationist

View guide to getting this achievementConservationist9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill five enemies with the same energy ball.

Hack Attack!

View guide to getting this achievementHack Attack!9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Kill five enemies with a Manhack.

OSHA Violation

View guide to getting this achievementOSHA Violation7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill 3 enemies using the crane.

Dynasty

View guide to getting this achievementDynasty22 (10)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other playersCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Win 20 games.

Turret

View guide to getting this achievementTurret11 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Accumulate 10 turret kills with a single turret.

Secret Achievement

View guide to getting this achievementSecret Achievement7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Secret Achievement

View guide to getting this achievementSecret Achievement7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Bone Breaker

View guide to getting this achievementBone Breaker7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Kill 30 enemies with thrown physics objects.

Zero-Point Energy

View guide to getting this achievementZero-Point Energy6 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Get the Gravity Gun in Black Mesa East.

Revenge!

View guide to getting this achievementRevenge!13 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Destroy the hunter-chopper in Half-Life 2.

Heavy Weapons

View guide to getting this achievementHeavy Weapons6 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Get the airboat's mounted gun.

Vorticough

View guide to getting this achievementVorticough23 (13)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Discover the hidden singing vortigaunt cave in chapter Water Hazard.

Targetted Advertising

View guide to getting this achievementTargetted Advertising9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Pin a soldier to the billboard in chapter Highway 17.

Hot PotatOwned

View guide to getting this achievementHot PotatOwned16 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill a Combine soldier with his own grenade.

Zombie Chopper

View guide to getting this achievementZombie Chopper47 (25)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Play through Ravenholm using only the Gravity Gun.

Two Points

View guide to getting this achievementTwo Points3 (2)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Use DOG's ball to make a basket in Eli's scrapyard.

Blast from the Past

View guide to getting this achievementBlast from the Past17 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Find the HEV Suit Charger faceplate in Eli's scrapyard.

Nemesis

View guide to getting this achievementNemesis10 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other playersCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Get five revenge kills.

Grey Matter

View guide to getting this achievementGrey Matter11 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other playersCumulative - This achievement is obtained by gradually increasing one’s total number of experience points, kills, hours, or similar measures, over time to meet certain goals
Get 25 headshots as a Sniper.

Anchor's Aweigh!

View guide to getting this achievementAnchor's Aweigh!6 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Get the airboat.

Trusty Hardware

View guide to getting this achievementTrusty Hardware5 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Get the crowbar.

Malcontent

View guide to getting this achievementMalcontent5 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Escape the apartment block raid.

Secret Achievement

View guide to getting this achievementSecret Achievement7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Continue playing to unlock this secret achievement. (Secret)

What cat?

View guide to getting this achievementWhat cat?8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Break the mini-teleporter in Kleiner's lab.

Barnacle Bowling

View guide to getting this achievementBarnacle Bowling7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill five barnacles with one barrel.

Secret Achievement

View guide to getting this achievementSecret Achievement7 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Continue playing to unlock this secret achievement. (Secret)

Head of the Class

View guide to getting this achievementHead of the Class10 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Play a complete round with every class.

Impossible Defense

View guide to getting this achievementImpossible Defense60 (30)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Successfully defend Gravel Pit without giving up a capture.

Lightning Offense

View guide to getting this achievementLightning Offense18 (10)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Win Well in 5 minutes or less.

Master of Disguise

View guide to getting this achievementMaster of Disguise28 (15)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Trick an opposing medic into healing you.

Powerhouse Offense

View guide to getting this achievementPowerhouse Offense8 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Win 2Fort with a shutout.

Relentless Offense

View guide to getting this achievementRelentless Offense37 (20)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Win Hydro without giving up a capture.

World Traveler

View guide to getting this achievementWorld Traveler9 (5)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Play a complete game on every map.

Hard to Kill

View guide to getting this achievementHard to Kill16 (10)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Get five kills in a row without dying.

Impenetrable Defense

View guide to getting this achievementImpenetrable Defense19 (10)

Online/Offline - This achievement can be obtained in either an online or offline modeVersus - This achievement can be obtained in modes based on competition against other players
Successfully defend Dustbowl without giving up a capture.

Fruitcake

View guide to getting this achievementFruitcake36 (20)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Beat four Portal advanced maps.

Cupcake

View guide to getting this achievementCupcake16 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Beat two Portal advanced maps.

Terminal Velocity

View guide to getting this achievementTerminal Velocity7 (5)

1 gamer needs helpOffline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Fall 30,000 feet.

Heartbreaker

View guide to getting this achievementHeartbreaker12 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Complete Portal.

Partygoer

View guide to getting this achievementPartygoer6 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Make the correct party escort submission position decision.

Fratricide

View guide to getting this achievementFratricide6 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Do whatever it takes to survive.

Friendly Fire

View guide to getting this achievementFriendly Fire6 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Knock down a turret with another turret.

Lab Rat

View guide to getting this achievementLab Rat5 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Acquire the fully powered Aperture Science Handheld Portal Device.

Vanilla Crazy Cake

View guide to getting this achievementVanilla Crazy Cake60 (30)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Beat all six Portal advanced maps.

Camera Shy

View guide to getting this achievementCamera Shy13 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCollectable - This achievement is obtained by exploring the game environment to find a set of unique objectsMissable - This achievement will require starting a new save file if the opportunity to obtain it is missed
Detach security cameras from the walls.

Get Some Grub

View guide to getting this achievementGet Some Grub68 (20)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCollectable - This achievement is obtained by exploring the game environment to find a set of unique objects
Squish every antlion grub in Episode Two.

With Friends Like these...

View guide to getting this achievementWith Friends Like these...30 (10)

Online Required - This achievement requires play in online game modesVersus - This achievement can be obtained in modes based on competition against other players3+ Players Required - This achievement requires more than two people to be participating in order for anyone to obtain it
Play in a game with seven or more players from your friends list.

Little Rocket Man

View guide to getting this achievementLittle Rocket Man84 (30)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMissable - This achievement will require starting a new save file if the opportunity to obtain it is missed
Send the garden gnome into space.

Keep Off the Sand!

View guide to getting this achievementKeep Off the Sand!46 (20)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Cross the antlion beach in chapter Sandtraps without touching the sand.

Neighborhood Watch

View guide to getting this achievementNeighborhood Watch108 (35)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Save all buildings outside the missile silo from destruction.

Secret Achievement

View guide to getting this achievementSecret Achievement35 (20)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Payback

View guide to getting this achievementPayback22 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Kill a Hunter with its own flechettes.

Secret Achievement

View guide to getting this achievementSecret Achievement8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Pedal to the Metal

View guide to getting this achievementPedal to the Metal9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Beat DOG in a race to the White Forest base.

Cache Checker

View guide to getting this achievementCache Checker18 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Find every radar cache in chapter Under The Radar.

Secret Achievement

View guide to getting this achievementSecret Achievement16 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Gordon Propelled Rocket

View guide to getting this achievementGordon Propelled Rocket9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Unlock the rocket launcher lambda cache in chapter Under The Radar.

Hit and Run

View guide to getting this achievementHit and Run9 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Run over 20 enemies with the car in Episode Two.

Secret Achievement

View guide to getting this achievementSecret Achievement8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Puttin' On a Clinic

View guide to getting this achievementPuttin' On a Clinic37 (15)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Defeat the chopper in Episode Two without any misses.

Secret Achievement

View guide to getting this achievementSecret Achievement16 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Continue playing to unlock this secret achievement. (Secret)

Secret Achievement

View guide to getting this achievementSecret Achievement8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Continue playing to unlock this secret achievement. (Secret)

Pinata Party

View guide to getting this achievementPinata Party12 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesCollectable - This achievement is obtained by exploring the game environment to find a set of unique objects
Find and break every web cache in Episode Two.

Into the Breach

View guide to getting this achievementInto the Breach8 (5)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modesMain Storyline - This achievement is gained automatically by progressing through the main game mode
Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

Basic Science

View guide to getting this achievementBasic Science52 (10)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Earn bronze medals on all Portal challenges.

Rocket Science

View guide to getting this achievementRocket Science107 (20)

Offline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Earn silver medals on all Portal challenges.

Aperture Science

View guide to getting this achievementAperture Science222 (40)

1 gamer needs helpOffline Required - This achievement requires play in offline game modesSingle Player - This achievement can be obtained in single player game modes
Earn gold medals on all Portal challenges.