Full list of all 60 Aliens: Colonial Marines achievements worth 1,250 gamerscore.
The base game contains 50 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 250 Gamerscore.
Earn Rank 60 as a Marine
Kill 2179 Xenomorphs
Complete all Challenges
Collect all 35 Dog Tags
Collect all 12 Audio Logs
Find the Easter Egg
Defeat the Raven in under 1:10 on Soldier difficulty or higher
Upgrade every Appearance slot once for your Marine
Complete an entire Challenge category
Arm the emergency release and escape in under 2:30 on Sulaco Falls
Kill 3 enemies with a single U4 Firebomb
Upgrade every Appearance slot once for a Xenomorph class
Kill 5 Spitters without being damaged by acid
Defeat all Xenomorphs in the Sulaco hangar bay without them crossing your barricade
Melee a Lurker that is pouncing towards you
Upgrade every Loadout slot for a Xenomorph class
Spend 30 Commendations
Kill 10 Xenomorphs in a game with the M56A2 Smart Gun
Upgrade every slot for a weapon
Complete all Campaign levels on any difficulty
Complete all Campaign levels on Hardened difficulty
Complete all Campaign levels on Ultimate Badass difficulty
Complete Home
Purchase all Upgrades for a weapon
Collect all 6 Legendary Weapons
Complete Hope in Hadley's
Kill 10 Xenomorphs that are using vents
Complete Rampart
Complete One Bullet without setting off the alarm
Gib two enemies at once
Earn Rank 20 as a Marine
Complete The Raven
Find Newt's doll
Track 100 hostile targets with the Motion Tracker
Edit a Xenomorph Loadout
Set up a UA 571-C Remote Sentry
Kill a Crusher without it damaging you
Have another player join your party
Complete Sulaco Falls
Survive a Close Encounter with a Facehugger
Complete Distress
Collect a Legendary Weapon
Collect a Dog Tag
Complete a Challenge
Edit a Marine Loadout
Earn Rank 2 as a Marine
Rescue a teammate from a Close Encounter
Kill a Xenomorph climbing on the walls or ceiling
Revive a teammate
Kill a Xenomorph with a shotgun at very close range
Complete Stasis Interrupted on Ultimate Badass
Complete Stasis Interrupted on any difficulty
Find All Stasis Interrupted Audio Logs
Destroy all samples in the labs of the Queen module
Survive the Queen escape
Escape the FTL ship
Kill all the Lurkers in Sulaco engineering
Sever the umbilical without missing a shot
Destroy the Legato
Find your family