Defeat Kraven on any difficulty level

Defeat 100 enemies

Execute a 100-hit combo

Play Three Songs on Zurkie's Jukebox

Use a merchant to repair an item.

Equip a rare (yellow) item.

Kill one of the unique enemies listed in the Never Seen That Before Challenge.

Use the teleporter 8 times. (Map Pack 3 only)

Upgrade 5 weapons at the Pack A Punch Machine. (Map Pack 3 only)

Kill 40 zombies with the bowie knife. (Map Pack 3 only)

Complete Left Behind

Use bricks or bottles to lure an infected into attacking a human