During a campaign, kill 100 Xenomorphs.

Secure an unconscious marine.

Save a marine from dying of Bleeding.

Prevent a marine from being Abducted.

Finish a level without doing any damage

Kill 10 units with Catapult with one Stone

Bare handed or with a weapon, standing up, against a wall, a ledge, or on the ground... Perform each takedown type at least once.

Finish the story in Medium mode (Adventurer)

Beat the Black Mamba

Visit all the caves

Craft a synthetic armor set

Have a Sim become both max thin and fat within a lifetime.

Complete the campaign on hard, recruit all commanders and keep them alive