Complete the tutorial.
Complete your first mission.
Complete day 5.
Complete day 10.
Complete day 15.
Complete a mission with just 1 marine in the squad.
Complete a mission with just 1 unarmed marine in the squad.
Complete mission B74-1 without getting any marines killed.
Complete a mission with 3 marines equipped with rocket launchers.
Get an A in a mission.
Complete mission A93-1 in less than 52 seconds.
Complete mission C10-1 in more than 27 minutes and 46 seconds.
Kill a boss vortex alien.
Kill a boss worker alien.
Kill more than 20 aliens in B07-1.
Kill more than 20 aliens in C89-2.
Unlock a sergeant as loot.
Eat a crew member to stay alive.
Unlock and lose all possible marines.. Really, you lost all 38?!
Equip Nye with an Opium Cigarette.
Equip a marine with tea and biscuits.
Equip a marine with a call in torpedo.
Equip a marine with an opium cigarette and absinthe. "Is it a machine gun.. or a shotgun?"
