Vanquish 5000 Plants.

Kill 3 Red Dudes with one shotgun shot.

Kill 100 Red Dudes with a shotgun.

In Campaign, kill an enemy through a wall or obstruction.

Kill 100 Red Dudes with a katana.

Complete the game.

Score 100 headshots.

Cut bullet with a katana.

Get back to the system after being expelled.

Complete SERV level.

Complete SUBWAY level.

In a public match, have at least 3 survivors hooked in the basement at the same time.

Reach prestige Level I with any character.