Complete the game in Spartan Mode.

Kill 200 Mutants.

Kill a librarian.

Kill 50 Watchmen.

Complete the level BLACK STATION without killing or knocking out any enemies.

On the level OUTPOST reach the radio tower and broadcast the commander's message.

Kill 100 enemies with shotguns.

Kill 30 human enemies with headshots.

Wipe your Gas Mask 20 times.

Kill the Enderdragon.

Kill 10 Enemies in a row without taking any damage.

Discover 17 of 40 biomes.

Acquire 30 Emeralds by trading with villagers or mining.