Purchased a weapon.

Cleared Chapter 1 in Story Mode.

Raised compatibility of a weapon to maximum.

Upgraded a weapon using Weapon Fusion.

Achieved 1000 K.O.s.

Purchase all available alternative costumes in Bonus Features.

Defeat 2 enemies with one flash grenade.

Obtain a successful tackle percentage of 80% with a minimum of 5 tackles in a game

Complete "Desperate Escape" on any difficulty setting.

Take out 100 enemies

Take out 20 enemies

Beat the fourth boss.

Wield the pipe in single-player or co-op mode.