Survive an explosion

Personally shoot 1000 aliens

Over 100 000 aliens killed globally

Finish episode 1 on any difficulty

Finish episode 1 on nightmare

Finish episode 2 on any difficulty

Finish episode 2 on nightmare to unlock nightmare++

Finish survival mod

Survive an alien attack

Kill an airborn alien

Survive 15 vawes in survival mod

Activate the nuke and escape - survival mod

Find the alien artifact in episode 2

Extract 75 civilians in one game

Finish episode 2 without personally shooting a single alien

Finish episode 2 personally killing at least 10 aliens and personally liberating at least one civilian

Kill 25 aliens in a row using a sniper rifle without missing a single shot - survival mod

Kill 8 aliens in a row using a shotgun without reloading

Burn 100 aliens using a flamethrower

Kill 100 aliens using grenades or grenade launcher - survival mod

Kill 10 aliens using a minigun in one full burst

Kill 100 aliens using a bladed weapon - survival mod

Traverse 33% of the sector driving the APC without stopping

Kill alien princess with a bladed weapon

Force 100 aliens into abyss

Drive over 100 aliens