XCOM: Enemy Unknown achievements

Modify a soldier.

Staff the Research Labs with 80 scientists.

Staff the Engineering Department with 80 engineers.

Complete Friends in Low Places.

Beat the game on any difficulty.

Stop a squad member from suffocating in single player

In a single game, complete every Autopsy.

Kill 500 aliens.

Kill 50 aliens with explosive weapons.

Build a S.H.I.V

Gain access to the lowest level in your base.

Acquire 1000 credits in one month.