The House of the Dead 2 & 3 Return Cheats

Go through original mode, but at the begining select the 2.0 bullets and Double score items. Play through original mode, rescuing all civillians except for the one on level 4 (the guy the Zombie is holding on to). Then beat the game. You'll end up in a Secret room. In the trunk is a Rogan Costume and an Infinite Credits icon.

To access one of the bonus rooms at the end of the game, you must get there without killing any hostages, or allowing any hostages to be killed.

Shoot a cat and it will lead you to a bonus item.

In order to unlock the one-player only extreme mode for House of the Dead 3, you need to beat both House of the Dead 2 and House of the Dead 3. Extreme mode requires you to hit weak points to kill enemies and allows the use of a blocking attack.

Upon clearing House of the Dead 3, you unlock the ability to play on Very Easy or Very Hard, along with the ability to use 5 lives and 9 continues.

Upon clearing House of the Dead 2, you unlock the ability to play on Very Easy and Very Hard, along with the ability to use 5 lives and 9 continues.