Gather all datapads.

Keep all of your marines alive during a campaign.

During a campaign, unlock every weapons.

During a campaign, unlock every Xeno Tech.

Kill an enemy by using an explosive barrel.

Destroy 4 eggs with one grenade or an RPG shot.

Finish the game on Hard.

Finish the game on "No One Can Hear Them Scream" mode.

Finish the game on Medium.

Finish the game on Nightmare.

Kill every Alien of a Massive Onslaught.

Kill an enemy before they detect the squad.

During a campaign, kill 100 Xenomorphs.

During a campaign, advance each Marine Class to level 10.

Advance a Gunner to level 10.

Advance a Medic to level 10.

Advance a Recon to level 10.

Advance a Sergeant to level 10.

Advance a Tecker to level 10.

In any mission, complete at least one objective with only one marine in the squad.

Prevent a marine from being Abducted.

Save a marine from dying of Bleeding.

During a campaign, secure 5 survivors.

Secure an unconscious marine.

Have one Sentry kill at least 10 aliens.

Remove a Trait from a marine.

Make the ARC/APC run over an enemy.

Save a Marine from being incubated.

Kill every Queen during a campaign.

Lure a Queen into a Mine.

Have a marine with at least 2 Prostheses.

Complete Mission 01.

Complete Mission 02.

Complete Mission 03.

Complete Mission 04.

Complete Mission 05.

Complete Mission 06.

Complete Mission 07.

Complete Mission 08.

Complete Mission 09.

Complete Mission 10.

Complete Mission 11.

Complete Mission 12.

Finish the Prologue.

Unlock the APC.