| Unlockable: | How to unlock: |
| ... 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 |
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