Game Over, Man!:         Complete all Campaign levels on any difficulty
Not Bad For a Human:     Complete all Campaign levels on Hardened difficulty
State of the Badass Art: Complete all Campaign levels on Ultimate Badass difficulty

Just a Grunt:                Complete Hope in Hadley's
Dragged Queen:               Complete Home
Still Got a Job to Do:       Complete Rampart

Stay Frosty:                 Complete an entire Challenge category
Distinguished Service Medal: Complete all Challenges
No Need For Alarm:           Complete One Bullet without setting off the alarm
Heavy Lifting:               Defeat the Raven in under 1:10 on Soldier difficulty or higher
Fire Drill:                  Arm the emergency release and escape in under 2:30 on Sulaco Falls


Remember the Fallen:        Collect all 35 Dog Tags
I Like to Keep These Handy: Collect all 6 Legendary Weapons
I Heard THAT:               Collect all 12 Audio Logs
Easter Egg:                 Find the Easter Egg

Field Modified, Kill Certified: Upgrade every slot for a weapon
I Can Handle Myself:            Purchase all Upgrades for a weapon
Majority Shareholder:           Spend 30 Commendations

Micro Changes in Air Density: Track 100 hostile targets with the Motion Tracker
Love at First Sight:          Survive a Close Encounter with a Facehugger
No Offense:                   Melee a Lurker that is pouncing towards you
It's a Dry Heat:              Kill 3 enemies with a single U4 Firebomb
Arbitrarily Exterminated:     Kill 2179 Xenomorphs

Adaptive Morphology:     Upgrade every Appearance slot once for a Xenomorph class
Perfect Killing Machine: Upgrade every Loadout slot for a Xenomorph class

Lean and Mean:             Earn Rank 20 as a Marine
I Love the Corps!:         Earn Rank 60 as a Marine
You Look Just Like I Feel: Upgrade every Appearance slot once for your Marine