The House of the Dead III Cheats
If you do well enough, you will get some boxes with items in them before you face the Wheel Of Fate.
Before playing go to the options menu and set the game to display at 60 frames per second. Then, set your crosshair speed to a bit faster than normal. This will make it easier to get headshots and you'll also get more S rankings.
To get the bonuses, you and/or your partner cannot use a continue. The bonuses are located just before you reach the final Boss.
Easy game completion
Set the options to 9 credits, 5 fire things, and you must be playing with a light gun. Set the light-gun to auto-fire so that if you hold the trigger you will fire more bullets faster. You can defeat the giant opponent easily.
After you see Rogan and G finish talking, you will see Daniel and Lisa talking. Then, Lisa will start walking ahead of Daniel. Daniel will tell her to wait, and then he will start talking to himself. They will then walk off.
If you choose the parking entrance, keep going until the "security guard" chases you twice. After the second time, look to your right and you will see three to four barrels. One of them has a bonus in it.
Finish 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.
Free play 2
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.