Game

2,184

(1,000)

4.3 from 8821 votes

80,204 tracked gamers have this game, 1,925 have completed it (2.40%) | 365 want to boost

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

73%

MooseMcD1,158 (645)

First played Tuesday, 17 February 2009

72 achievements out of 99 won

Complete Portal.

0.0Achievement won by MooseMcD on 16 April 2011 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 53,844 tracked gamers (67% - TA Ratio = 1.22)

Save all buildings outside the missile silo from destruction.

-0.1Achievement won by MooseMcD on 22 April 2009 | There are 5 guides | Earn this in the Walkthrough

Unlocked by 8,377 tracked gamers (10% - TA Ratio = 3.09)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 22 April 2009 | Show secret details | There is 1 guide | Earn this in the Walkthrough

Unlocked by 26,218 tracked gamers (33% - TA Ratio = 1.75)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 21 April 2009 | Show secret details | There is 1 guide | Earn this in the Walkthrough

Unlocked by 29,246 tracked gamers (36% - TA Ratio = 1.66)

Send the garden gnome into space.

0.0Achievement won by MooseMcD on 21 April 2009 | There are 5 guides | Earn this in the Walkthrough

Unlocked by 10,286 tracked gamers (13% - TA Ratio = 2.79)

Beat DOG in a race to the White Forest base.

0.0Achievement won by MooseMcD on 21 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 22,601 tracked gamers (28% - TA Ratio = 1.88)

Find every radar cache in chapter Under The Radar.

0.0Achievement won by MooseMcD on 21 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 25,929 tracked gamers (32% - TA Ratio = 1.76)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 21 April 2009 | Show secret details | There is 1 guide | Earn this in the Walkthrough

Unlocked by 29,579 tracked gamers (37% - TA Ratio = 1.65)

Unlock the rocket launcher lambda cache in chapter Under The Radar.

0.0Achievement won by MooseMcD on 21 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 27,550 tracked gamers (34% - TA Ratio = 1.71)

Run over 20 enemies with the car in Episode Two.

0.0Achievement won by MooseMcD on 21 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 23,415 tracked gamers (29% - TA Ratio = 1.85)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 21 April 2009 | Show secret details | There is 1 guide | Earn this in the Walkthrough

Unlocked by 29,779 tracked gamers (37% - TA Ratio = 1.64)

Defeat the chopper in Episode Two without any misses.

0.0Achievement won by MooseMcD on 20 April 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 13,519 tracked gamers (17% - TA Ratio = 2.44)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 20 April 2009 | Show secret details | There is 1 guide | Earn this in the Walkthrough

Unlocked by 30,486 tracked gamers (38% - TA Ratio = 1.62)

Kill a Hunter with its own flechettes.

0.0Achievement won by MooseMcD on 20 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 16,471 tracked gamers (21% - TA Ratio = 2.21)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 19 April 2009 | Show secret details | There are 2 guides | Earn this in the Walkthrough

Unlocked by 31,338 tracked gamers (39% - TA Ratio = 1.60)

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

0.0Achievement won by MooseMcD on 17 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 33,728 tracked gamers (42% - TA Ratio = 1.54)

Kill an acid antlion worker.

0.0Achievement won by MooseMcD on 17 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 35,608 tracked gamers (44% - TA Ratio = 1.50)

Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!

0.0Achievement won by MooseMcD on 16 April 2009 | There are 6 guides | Earn this in the Walkthrough

Unlocked by 16,662 tracked gamers (21% - TA Ratio = 2.19)

Escape City 17 with Alyx.

0.0Achievement won by MooseMcD on 16 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 32,538 tracked gamers (41% - TA Ratio = 1.57)

Don't let any citizens die when escorting them to the escape train.

0.0Achievement won by MooseMcD on 16 April 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 23,943 tracked gamers (30% - TA Ratio = 1.83)

Destroy the gunship in the hospital attic.

0.0Achievement won by MooseMcD on 16 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 33,365 tracked gamers (42% - TA Ratio = 1.55)

Use the cars to squash 15 antlions in Episode One.

0.0Achievement won by MooseMcD on 16 April 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 24,970 tracked gamers (31% - TA Ratio = 1.79)

Help Alyx snipe 30 enemies in Episode One.

0.0Achievement won by MooseMcD on 16 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 29,702 tracked gamers (37% - TA Ratio = 1.64)

Survive long enough to get on the parking garage elevator.

0.0Achievement won by MooseMcD on 16 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 34,656 tracked gamers (43% - TA Ratio = 1.52)

Steal a Zombine's grenade.

0.0Achievement won by MooseMcD on 15 April 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 33,244 tracked gamers (41% - TA Ratio = 1.55)

Contain the Citadel core without killing any stalkers.

0.0Achievement won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 16,370 tracked gamers (20% - TA Ratio = 2.21)

Contain the Citadel core.

0.0Achievement won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 36,882 tracked gamers (46% - TA Ratio = 1.47)

Make it to the bottom of the Citadel's main elevator shaft in one piece.

0.0Achievement won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 37,917 tracked gamers (47% - TA Ratio = 1.45)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 13 April 2009 | Show secret details | There is 1 guide | Earn this in the Walkthrough

Unlocked by 34,179 tracked gamers (43% - TA Ratio = 1.53)

Shut down the supression device by disabling its generators.

0.0Achievement won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 35,314 tracked gamers (44% - TA Ratio = 1.51)

Survive the rooftop strider battle in the ruins of City 17.

0.0Achievement won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 34,771 tracked gamers (43% - TA Ratio = 1.52)

Disintegrate 15 soldiers by throwing them into a Combine ball field.

0.0Achievement won by MooseMcD on 11 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 28,872 tracked gamers (36% - TA Ratio = 1.67)

Kill an Elite Soldier with his own energy ball.

0.0Achievement won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 29,912 tracked gamers (37% - TA Ratio = 1.64)

Survive the generator plaza standoff in chapter Anticitizen One.

0.0Achievement won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 36,167 tracked gamers (45% - TA Ratio = 1.49)

Kill five enemies with the same energy ball.

0.0Achievement won by MooseMcD | There are 6 guides | Earn this in the Walkthrough

Unlocked by 24,590 tracked gamers (31% - TA Ratio = 1.81)

Get five kills in a row without dying.

0.0Achievement won by MooseMcD on 02 April 2009 | There are 8 guides | Earn this in the Walkthrough

Unlocked by 30,714 tracked gamers (38% - TA Ratio = 1.62)

Get through the toxic tunnel under City 17 in Half-Life 2.

0.0Achievement won by MooseMcD on 01 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 36,486 tracked gamers (45% - TA Ratio = 1.48)

Kill five enemies with a Manhack.

0.0Achievement won by MooseMcD on 01 April 2009 | There are 4 guides | Earn this in the Walkthrough

Unlocked by 23,103 tracked gamers (29% - TA Ratio = 1.86)

Kill an enemy by planting a hopper mine.

0.0Achievement won by MooseMcD on 01 April 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 37,831 tracked gamers (47% - TA Ratio = 1.46)

Gain command of a squad of rebels in the uprising.

0.0Achievement won by MooseMcD on 01 April 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 37,053 tracked gamers (46% - TA Ratio = 1.47)

Survive the second turret standoff in Nova Prospekt.

0.0Achievement won by MooseMcD on 31 March 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 37,270 tracked gamers (46% - TA Ratio = 1.47)

Kill an enemy with a toilet.

0.0Achievement won by MooseMcD on 26 March 2009 | There are 5 guides | Earn this in the Walkthrough

Unlocked by 24,581 tracked gamers (31% - TA Ratio = 1.81)

Destroy six gunships in Half-Life 2.

0.0Achievement won by MooseMcD on 26 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 35,551 tracked gamers (44% - TA Ratio = 1.50)

Kill 3 enemies using the crane.

0.0Achievement won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 36,902 tracked gamers (46% - TA Ratio = 1.47)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD | Show secret details | There are 2 guides | Earn this in the Walkthrough

Unlocked by 43,031 tracked gamers (54% - TA Ratio = 1.37)

Pin a soldier to the billboard in chapter Highway 17.

0.0Achievement won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 26,032 tracked gamers (32% - TA Ratio = 1.76)

Kill a Combine soldier with his own grenade.

0.0Achievement won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 29,797 tracked gamers (37% - TA Ratio = 1.64)

Use the antlions to kill 50 enemies.

0.0Achievement won by MooseMcD on 25 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 39,121 tracked gamers (49% - TA Ratio = 1.43)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 17 March 2009 | Show secret details | There are 3 guides | Earn this in the Walkthrough

Unlocked by 44,762 tracked gamers (56% - TA Ratio = 1.34)

Kill 30 enemies with thrown physics objects.

0.0Achievement won by MooseMcD on 17 March 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 45,082 tracked gamers (56% - TA Ratio = 1.33)

Use DOG's ball to make a basket in Eli's scrapyard.

0.0Achievement won by MooseMcD on 16 March 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 30,867 tracked gamers (38% - TA Ratio = 1.61)

Find the HEV Suit Charger faceplate in Eli's scrapyard.

0.0Achievement won by MooseMcD on 16 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 28,230 tracked gamers (35% - TA Ratio = 1.69)

Get the Gravity Gun in Black Mesa East.

0.0Achievement won by MooseMcD on 16 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 48,621 tracked gamers (61% - TA Ratio = 1.28)

Destroy the hunter-chopper in Half-Life 2.

0.0Achievement won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 48,972 tracked gamers (61% - TA Ratio = 1.28)

Get the airboat's mounted gun.

0.0Achievement won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 50,861 tracked gamers (63% - TA Ratio = 1.26)

Discover the hidden singing vortigaunt cave in chapter Water Hazard.

0.0Achievement won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 25,621 tracked gamers (32% - TA Ratio = 1.77)

Get the airboat.

0.0Achievement won by MooseMcD on 12 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 55,924 tracked gamers (70% - TA Ratio = 1.20)

Kill five barnacles with one barrel.

0.0Achievement won by MooseMcD on 12 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 40,295 tracked gamers (50% - TA Ratio = 1.41)

Get the crowbar.

0.0Achievement won by MooseMcD on 12 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 66,980 tracked gamers (84% - TA Ratio = 1.09)

Break the mini-teleporter in Kleiner's lab.

0.0Achievement won by MooseMcD on 04 March 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 33,642 tracked gamers (42% - TA Ratio = 1.54)

Escape the apartment block raid.

0.0Achievement won by MooseMcD on 04 March 2009 | There is 1 guide | Earn this in the Walkthrough

Unlocked by 68,148 tracked gamers (85% - TA Ratio = 1.08)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement won by MooseMcD on 03 March 2009 | Show secret details | There are 3 guides | Earn this in the Walkthrough

Unlocked by 41,713 tracked gamers (52% - TA Ratio = 1.39)

Fall 30,000 feet.

0.0Achievement won by MooseMcD on 03 March 2009 | 1 gamer needs help | There are 5 guides | Earn this in the Walkthrough

Unlocked by 37,803 tracked gamers (47% - TA Ratio = 1.46)

Win 2Fort with a shutout.

0.0Achievement won by MooseMcD on 03 March 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 31,445 tracked gamers (39% - TA Ratio = 1.60)

Get five revenge kills.

0.0Achievement won by MooseMcD on 02 March 2009 | There are 5 guides | Earn this in the Walkthrough

Unlocked by 21,894 tracked gamers (27% - TA Ratio = 1.91)

Win Well in 5 minutes or less.

0.0Achievement won by MooseMcD on 25 February 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 24,258 tracked gamers (30% - TA Ratio = 1.82)

Play a complete game on every map.

0.0Achievement won by MooseMcD on 25 February 2009 | There are 5 guides | Earn this in the Walkthrough

Unlocked by 22,413 tracked gamers (28% - TA Ratio = 1.89)

Play a complete round with every class.

0.0Achievement won by MooseMcD on 24 February 2009 | There are 4 guides | Earn this in the Walkthrough

Unlocked by 18,877 tracked gamers (24% - TA Ratio = 2.06)

Win Hydro without giving up a capture.

0.0Achievement won by MooseMcD on 24 February 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 22,890 tracked gamers (29% - TA Ratio = 1.87)

Make the correct party escort submission position decision.

0.0Achievement won by MooseMcD on 17 February 2009 | There are 3 guides | Earn this in the Walkthrough

Unlocked by 55,248 tracked gamers (69% - TA Ratio = 1.20)

Do whatever it takes to survive.

0.0Achievement won by MooseMcD on 17 February 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 60,125 tracked gamers (75% - TA Ratio = 1.15)

Acquire the fully powered Aperture Science Handheld Portal Device.

0.0Achievement won by MooseMcD on 17 February 2009 | There are 2 guides | Earn this in the Walkthrough

Unlocked by 69,170 tracked gamers (86% - TA Ratio = 1.08)

Set five enemies on fire in 30 seconds.

0.0Achievement not yet won by MooseMcD | There are 8 guides | Earn this in the Walkthrough

Unlocked by 14,854 tracked gamers (19% - TA Ratio = 2.32)

Win 20 games.

0.0Achievement not yet won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 17,069 tracked gamers (21% - TA Ratio = 2.17)

Successfully defend Gravel Pit without giving up a capture.

0.0Achievement not yet won by MooseMcD | There are 4 guides | Earn this in the Walkthrough

Unlocked by 20,159 tracked gamers (25% - TA Ratio = 1.99)

Get 25 headshots as a Sniper.

0.0Achievement not yet won by MooseMcD | There are 5 guides | Earn this in the Walkthrough

Unlocked by 15,865 tracked gamers (20% - TA Ratio = 2.25)

Accumulate 10 turret kills with a single turret.

0.0Achievement not yet won by MooseMcD | There are 5 guides | Earn this in the Walkthrough

Unlocked by 16,453 tracked gamers (21% - TA Ratio = 2.21)

Beat four Portal advanced maps.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 24,285 tracked gamers (30% - TA Ratio = 1.82)

Trick an opposing medic into healing you.

0.0Achievement not yet won by MooseMcD | There are 6 guides | Earn this in the Walkthrough

Unlocked by 22,306 tracked gamers (28% - TA Ratio = 1.90)

Beat two Portal advanced maps.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 32,078 tracked gamers (40% - TA Ratio = 1.58)

Continue playing to unlock this secret achievement. (Secret)

0.0Achievement not yet won by MooseMcD | Show secret details | There are 3 guides | Earn this in the Walkthrough

Unlocked by 45,632 tracked gamers (57% - TA Ratio = 1.33)

Jump 300 feet.

0.0Achievement not yet won by MooseMcD | There are 6 guides | Earn this in the Walkthrough

Unlocked by 25,692 tracked gamers (32% - TA Ratio = 1.77)

Knock down a turret with another turret.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 52,112 tracked gamers (65% - TA Ratio = 1.24)

Squish every antlion grub in Episode Two.

-0.1Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 6,865 tracked gamers (9% - TA Ratio = 3.42)

Find all lambda caches in Half-Life 2.

-0.1Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 7,382 tracked gamers (9% - TA Ratio = 3.30)

Accumulate 1000 total kills.

0.0Achievement not yet won by MooseMcD | There are 10 guides | Earn this in the Walkthrough

Unlocked by 8,050 tracked gamers (10% - TA Ratio = 3.16)

Accumulate 25000 heal points as a Medic.

0.0Achievement not yet won by MooseMcD | There are 10 guides | Earn this in the Walkthrough

Unlocked by 13,162 tracked gamers (16% - TA Ratio = 2.47)

Play in a game with seven or more players from your friends list.

0.0Achievement not yet won by MooseMcD | There are 5 guides | Earn this in the Walkthrough

Unlocked by 8,953 tracked gamers (11% - TA Ratio = 2.99)

Cross the antlion beach in chapter Sandtraps without touching the sand.

0.0Achievement not yet won by MooseMcD | There are 6 guides | Earn this in the Walkthrough

Unlocked by 15,246 tracked gamers (19% - TA Ratio = 2.29)

Successfully defend Dustbowl without giving up a capture.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 21,539 tracked gamers (27% - TA Ratio = 1.93)

Beat all six Portal advanced maps.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 20,350 tracked gamers (25% - TA Ratio = 1.99)

Find and break every web cache in Episode Two.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 13,598 tracked gamers (17% - TA Ratio = 2.43)

Use flares to light 15 zombies on fire.

0.0Achievement not yet won by MooseMcD | There are 3 guides | Earn this in the Walkthrough

Unlocked by 12,027 tracked gamers (15% - TA Ratio = 2.58)

Kill all of the snipers in City 17.

0.0Achievement not yet won by MooseMcD | There are 2 guides | Earn this in the Walkthrough

Unlocked by 18,703 tracked gamers (23% - TA Ratio = 2.07)

Play through Ravenholm using only the Gravity Gun.

0.0Achievement not yet won by MooseMcD | There are 5 guides | Earn this in the Walkthrough

Unlocked by 22,581 tracked gamers (28% - TA Ratio = 1.88)

Detach security cameras from the walls.

0.0Achievement not yet won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 11,168 tracked gamers (14% - TA Ratio = 2.68)

Earn bronze medals on all Portal challenges.

-0.2Achievement not yet won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 2,964 tracked gamers (4% - TA Ratio = 5.20)

Earn silver medals on all Portal challenges.

-0.4Achievement not yet won by MooseMcD | There is 1 guide | Earn this in the Walkthrough

Unlocked by 2,813 tracked gamers (4% - TA Ratio = 5.34)

Earn gold medals on all Portal challenges.

-0.8Achievement not yet won by MooseMcD | 1 gamer needs help | There are 4 guides | Earn this in the Walkthrough

Unlocked by 2,607 tracked gamers (3% - TA Ratio = 5.55)

1	Crimzen dragon	2,184
2	Xstormer1	2,184
3	TheVinster	2,184
4	McWiIIy	2,184
5	Deaf Paradox	2,184
6	Mixmatch89	2,184
7	Volta Cosmos	2,184
8	X Dirge X	2,184
9	DogEyedBoy	2,184
10	Polygon Pirate	2,184

Achievements	Gamers With Achievement Count	MooseMcD
0	0
1	2293
2	2003
3	2612
4	2606
5	2920
6	2328
7	2111
8	2090
9	2054
10	1918
11	1773
12	1521
13	1465
14	1312
15	1175
16	1045
17	1140
18	1020
19	974
20	916
21	887
22	863
23	812
24	767
25	738
26	737
27	662
28	647
29	676
30	586
31	581
32	563
33	517
34	492
35	531
36	512
37	559
38	543

TrueAchievements

The Orange Box

MooseMcD1,158 (645)

First played Tuesday, 17 February 2009

The Orange Box Achievements

Heartbreaker12 (10)

Complete Portal.

Neighborhood Watch108 (35)

Save all buildings outside the missile silo from destruction.

Secret Achievement35 (20)

Continue playing to unlock this secret achievement. (Secret)

Secret Achievement8 (5)

Continue playing to unlock this secret achievement. (Secret)

Little Rocket Man84 (30)

Send the garden gnome into space.

Pedal to the Metal9 (5)

Beat DOG in a race to the White Forest base.

Cache Checker18 (10)

Find every radar cache in chapter Under The Radar.

Secret Achievement16 (10)

Continue playing to unlock this secret achievement. (Secret)

Gordon Propelled Rocket9 (5)

Unlock the rocket launcher lambda cache in chapter Under The Radar.

Hit and Run9 (5)

Run over 20 enemies with the car in Episode Two.

Secret Achievement8 (5)

Continue playing to unlock this secret achievement. (Secret)

Puttin' On a Clinic37 (15)

Defeat the chopper in Episode Two without any misses.

Secret Achievement16 (10)

Continue playing to unlock this secret achievement. (Secret)

Payback22 (10)

Kill a Hunter with its own flechettes.

Secret Achievement8 (5)

Continue playing to unlock this secret achievement. (Secret)

Into the Breach8 (5)

Help Griggs and Sheckley hold off the antlion invasion inside the mine shaft.

Acid Reflex8 (5)

Kill an acid antlion worker.

The One Free Bullet88 (40)

Beat Episode One firing exactly one bullet. Grenade, crowbar, rocket, and Gravgun kills are okay!

Escape From City 1731 (20)

Escape City 17 with Alyx.

Citizen Escort27 (15)

Don't let any citizens die when escorting them to the escape train.

Attica!8 (5)

Destroy the gunship in the hospital attic.

Car Crusher9 (5)

Use the cars to squash 15 antlions in Episode One.

Live Bait16 (10)

Help Alyx snipe 30 enemies in Episode One.

Elevator Action15 (10)

Survive long enough to get on the parking garage elevator.

Grave Robber8 (5)

Steal a Zombine's grenade.

Pacifist22 (10)

Contain the Citadel core without killing any stalkers.

Containment7 (5)

Contain the Citadel core.

Watch Your Head!7 (5)

Make it to the bottom of the Citadel's main elevator shaft in one piece.

Secret Achievement38 (25)

Continue playing to unlock this secret achievement. (Secret)

Fight the Power15 (10)

Shut down the supression device by disabling its generators.

Giant Killer15 (10)

Survive the rooftop strider battle in the ruins of City 17.

Atomizer17 (10)

Disintegrate 15 soldiers by throwing them into a Combine ball field.

Think Fast!16 (10)

Kill an Elite Soldier with his own energy ball.

Plaza Defender15 (10)

Survive the generator plaza standoff in chapter Anticitizen One.

Conservationist9 (5)

Kill five enemies with the same energy ball.

Hard to Kill16 (10)

Get five kills in a row without dying.

"Radiation Levels Detected"7 (5)

Get through the toxic tunnel under City 17 in Half-Life 2.

Hack Attack!9 (5)