Aliens: Dark Descent achievements

During a campaign, unlock every Xeno Tech.

Finish the game on Nightmare.

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

Keep all of your marines alive during a campaign.

During a campaign, unlock every weapons.

Advance a Medic to level 10.

Finish the game on Hard.

Advance a Gunner to level 10.

Advance a Sergeant to level 10.

Have one Sentry kill at least 10 aliens.

Advance a Tecker to level 10.

Finish the game on Medium.