Use planks and sticks to make a sword.

Attack and destroy a monster.

Open your inventory.

Fully mod a weapon.

In Origins, use Zombie Blood to revive three players and activate a generator in one game.

In Origins, share a weapon you dug up.

In Buried, drop the beat on 10 zombies in one game.

In Buried, acquire a perk for free.

In Green Run, acquire your Tombstone.

In Mob of the Dead, complete the cycle 3 times.

In Mob of the Dead, convert a weapon using a kit.

In Mob of the Dead, obtain Hell's Retriever.