Zombie Revenge - Platform: Dreamcast

Blood Color Option: 
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Beat Arcade Mode. 

Free Play: 
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Beat all 3 original modes. 

Level Select: 
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After choosing Fighting Mode, hold Start while 
selecting your character. 

Cheat Mode: 
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Obtain as many points as possible in the VMU mini-game 
to get Eternal Life, Area Select, Free Time
Limit and Free Continue options in Original Mode. 

Different Costumes: 
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At the Character Select screen, highlight any character, 
then hold Start and press B, X, or Y.