Steam Achievements
- ... But No Cigar - Rescue a teammate from a Close Encounter
- Adaptive Morphology - Upgrade every Appearance slot once for a Xenomorph class
- Adios, Muchachos - Gib two enemies at once
- Another Bug Hunt - Complete a Challenge
- Another Day in the Corps - Complete Distress
- Anytime, Anywhere - Kill a Crusher without it damaging you
- Arbitrarily Exterminated - Kill 2179 Xenomorphs
- Bad Feeling About This Drop - Complete Sulaco Falls
- Coming Outta the Walls! - Kill a Xenomorph climbing on the walls or ceiling
- Distinguished Service Medal - Complete all Challenges
- Don't Count Me Out - Revive a teammate
- Dragged Queen - Complete Home
- Easter Egg - Find the Easter Egg
- Eat This! - Kill a Xenomorph with a shotgun at very close range
- Entry Prohibited - Kill 10 Xenomorphs that are using vents
- Field Modified, Kill Certified - Upgrade every slot for a weapon
- Field Promotion - Earn Rank 2 as a Marine
- Fire Drill - Arm the emergency release and escape in under 2:30 on Sulaco Falls
- Game Over, Man! - Complete all Campaign levels on any difficulty
- Heavy Lifting - Defeat the Raven in under 1:10 on Soldier difficulty or higher
- I Can Handle Myself - Purchase all Upgrades for a weapon
- I Feel Safer Already - Have another player join your party
- I Heard THAT - Collect all 12 Audio Logs
- I Like to Keep These Handy - Collect all 6 Legendary Weapons
- I Love the Corps! - Earn Rank 60 as a Marine
- It's a Dry Heat - Kill 3 enemies with a single U4 Firebomb
- Just a Grunt - Complete Hope in Hadley's
- Lean and Mean - Earn Rank 20 as a Marine
- Let's Rock! - Kill 10 Xenomorphs in a game with the M56A2 Smart Gun
- Love at First Sight - Survive a Close Encounter with a Facehugger
- Majority Shareholder - Spend 30 Commendations
- Micro Changes in Air Density - Track 100 hostile targets with the Motion Tracker
- Mostly Come at Night - Find Newt's doll
- Need a Deck Of Cards? - Set up a UA 571-C Remote Sentry
- No Need For Alarm - Complete One Bullet without setting off the alarm
- No Offense - Melee a Lurker that is pouncing towards you
- Not Bad For a Human - Complete all Campaign levels on Hardened difficulty
- Oorah to Ashes - Collect a Dog Tag
- Perfect Killing Machine - Upgrade every Loadout slot for a Xenomorph class
- Personal Friend of Mine - Collect a Legendary Weapon
- Quoth the Raven - Complete The Raven
- Ready to Fry Half a City - Edit a Marine Loadout
- Remember the Fallen - Collect all 35 Dog Tags
- Secreted from What? - Kill 5 Spitters without being damaged by acid
- Short, Controlled Bursts - Defeat all Xenomorphs in the Sulaco hanger bay without them crossing your barricade
- State of the Badass Art - Complete all Campaign levels on Ultimate Badass difficulty
- Stay Frosty - Complete an entire Challenge category
- Still Got a Job to Do - Complete Rampart
- Structural Perfection - Edit a Xenomorph Loadout
- You Look Just Like I Feel - Upgrade every Appearance slot once for your Marine
