House of the Dead 3 Cheats

During the start of chapter 1, right after it asks you entrance or
parking, look for a silver dish (on the left side when your facing the
building). If you shoot it your points will double. They will continue
to double until you stop shooting it.

Successfully complete the game with an "A" rank.
Enter the options
screen and select "House Of The Dead 3".
You can now increase the
credits past nine until "Free Play" appears. Alternately, play well
and get better than an "A" rank one or more times during the game
at the point where you lose all your credits. This works best in
one player mode.

Blood Mode- Beat House of the Dead 2 in Survival mode

Free Play- Finish any chapter with A or S rank

Goldman Costume- Beat House of the Dead 2 in original mode

Goldman Zombie- Enable free play, intentionally get the lowest score possible on each level in HotD 2. At the end, Goldman will appear as a zombie

Successfully complete Boss mode with five red stars on all the Bosses. In the trunk of the car in original mode, you will have an item called 1/4 Life. This makes the zombies easier to kill.

Finish the game in original mode and a new option will be on the option menu