Complete One Bullet without setting off the alarm

Complete The Raven

Rescue a teammate from a Close Encounter

Kill 10 Xenomorphs in a game with the M56A2 Smart Gun

Arm the emergency release and escape in under 2:30 on Sulaco Falls

Collect a Dog Tag

Complete Distress

Kill 10 Xenomorphs that are using vents

Edit a Marine Loadout

Kill a Xenomorph with a shotgun at very close range

Complete the final mission on Human, Devil Hunter or Nephilim difficulty

Help Vergil open the Vault