Defeat Queen Leech.

Awarded for building your first room.

Obtain all keys and use them all.

Shoot down a Hunter or an Eliminator while they are jump attacking in the air.

Fight off the Proto Tyrant.

Defeat Mimicry Marcus with a Molotov Cocktail or a Napalm Grenade.

Get picked up by the Infected Bat.

Destroy a zombie's legs.

Create a Custom Handgun.

Use a Green Chemical.

Defeat an enemy by burning them.

Complete the train.

Defeat Stinger.