Finish the game on Medium.
Keep all of your marines alive during a campaign.
Complete Mission 12.
In any mission, complete at least one objective with only one marine in the squad.
Complete Mission 11.
During a campaign, advance each Marine Class to level 10.
Advance a Recon to level 10.
Advance a Sergeant to level 10.
Complete Mission 10.
Complete Mission 09.
Advance a Gunner to level 10.
Complete Mission 08.
During a campaign, unlock every weapons.
Advance a Medic to level 10.
Advance a Tecker to level 10.
Complete Mission 07.
Complete Mission 06.
Unlock the APC.
Complete Mission 05.
Complete Mission 04.
Complete Mission 03.
Remove a Trait from a marine.
Complete Mission 02.
Make the ARC/APC run over an enemy.
Save a Marine from being incubated.
Save a marine from dying of Bleeding.
Destroy 4 eggs with one grenade or an RPG shot.
During a campaign, secure 5 survivors.
Kill an enemy by using an explosive barrel.
Have one Sentry kill at least 10 aliens.
Complete Mission 01.
Kill an enemy before they detect the squad.
During a campaign, kill 100 Xenomorphs.
Secure an unconscious marine.
Kill every Alien of a Massive Onslaught.
Prevent a marine from being Abducted.
Finish the Prologue.
Unlock all trophies.
Finish the game on Hard.
Finish the game on Nightmare.
Finish the game on "No One Can Hear Them Scream" mode.
Kill every Queen during a campaign.
Lure a Queen into a Mine.
Gather all datapads.
During a campaign, unlock every Xeno Tech.
Have a marine with at least 2 Prostheses.
