10 Coming Outta the Walls!Kill a Xenomorph climbing on the walls or ceiling
10 Eat This!Kill a Xenomorph with a shotgun at very close range
10 Field PromotionEarn Rank 2 as a Marine
10 I Feel Safer AlreadyHave another player join your party
10 Love at First SightSurvive a Close Encounter with a Facehugger
10 Micro Changes in Air DensityTrack 100 hostile targets with the Motion Tracker
10 Oorah to AshesCollect a Dog Tag
10 Personal Friend of MineCollect a Legendary Weapon
20 ... But No CigarRescue a teammate from a Close Encounter
20 Adios, MuchachosGib two enemies at once
20 Another Day in the Corps!Complete Distress
20 Anytime, AnywhereKill a Crusher without it damaging you
20 Bad Feeling About This DropComplete Sulaco Falls
20 Dragged QueenComplete Home
20 Entry ProhibitedKill 10 Xenomorphs that are using vents
20 Field Modified, Kill CertifiedUpgrade every slot for a weapon
20 Fire DrillArm the emergency release and escape in under 2:30 on Sulaco Falls
20 Heavy LiftingDefeat the Raven in under 1:10 on Soldier difficulty or higher
20 It's a Dry HeatKill 3 enemies with a single U4 Firebomb
20 Just a GruntComplete Hope in Hadley's
20 Lean and MeanEarn Rank 20 as a Marine
20 Let's Rock!Kill 10 Xenomorphs in a game with the M56A2 Smart Gun
20 Mostly Come at Night...Find Newt's doll
20 No Need For AlarmComplete One Bullet without setting off the alarm
20 No OffenseMelee a Lurker that is pouncing towards you
20 Perfect Killing MachineUpgrade every Loadout slot for a Xenomorph class
20 Quoth the RavenComplete The Raven
20 Secreted from What?Kill 5 Spitters without being damaged by acid
20 Short, Controlled BurstsDefeat all Xenomorphs in the Sulaco hangar bay without them crossing your barricade
20 Stay FrostyComplete an entire Challenge category
20 Still Got a Job to DoComplete Rampart
25 I Heard THATCollect all 12 Audio Logs
25 Majority ShareholderSpend 30 Commendations
30 Adaptive MorphologyUpgrade every Appearance slot once for a Xenomorph class
30 Arbitrarily ExterminatedKill 2179 Xenomorphs
30 Distinguished Service MedalComplete all Challenges
30 Game Over, Man!Complete all Campaign levels on any difficulty
30 I Like to Keep These HandyCollect all 6 Legendary Weapons
30 Remember the FallenCollect all 35 Dog Tags
30 You Look Just Like I FeelUpgrade every Appearance slot once for your Marine
40 I Can Handle MyselfPurchase all Upgrades for a weapon
40 I Love the Corps!Earn Rank 60 as a Marine
40 Not Bad For a HumanComplete all Campaign levels on Hardened difficulty
5 Another Bug HuntComplete a Challenge
5 Don't Count Me OutRevive a teammate
5 Need a Deck Of Cards?Set up a UA 571-C Remote Sentry
5 Ready to Fry Half a CityEdit a Marine Loadout
5 Structural PerfectionEdit a Xenomorph Loadout
50 State of the Badass ArtComplete all Campaign levels on Ultimate Badass difficulty