Construct a furnace out of eight cobblestone blocks.

Attack and destroy a monster.

Use planks and sticks to make a hoe.

Use planks and sticks to make a pickaxe.

Punch a tree until the block of wood pops out.

Open your inventory.

Complete 'Clean House' without being hit using one bullet per threat.

Kill 3 Enemies while you are on a ladder.

Kill an enemy with a direct hit from a smoke grenade.

Take down a flying Helicopter with a molotov.

Only use one cinder block and bring it to the end of 'Embedded'.

Kill at least one enemy while inside The Reading Place, Aural Chic and both Subway undergrounds.

Complete every single player mission on Veteran or Realism difficulty.