The House of the Dead: Overkill Cheats

Unlockables for clearing Story Mode
Director's Cut Mode: Complete Story mode to unlock Director's Cut mode.
Handcannon Weapon: Complete Story mode to unlock the handcannon.

Unlockable One-Player Dual Wield
Unlock one-player dual wield mode (two remotes but one lifebar) by completing Director's Cut. This mode will be available in both Story and Director's Cut modes.

Unlockable MInigun
Complete the Director's Cut to unlock the minigun in the gun shop for Story and Director's Cut modes.

Unlockable Achievements
All the achievements in the game are listed in the Extra Contents menu (the extra videos, music, images, and 3D models). Simply perform the task required to unlock the item.

Unlockable Extra Mutants Mode
Complete Story mode to unlock extra mutants in Story mode (Director's Cut already uses extra mutants).

AutoShotgun Is All You Need
To get a consistent Goregasm combo, purchase and upgrade the autoshotgun to the maximum. All you need is one hit on most zombies to kill them, giving you one shot, one kill capability.