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Gamecube - Geist cheats

Multiplayer Features
Each two Host Collectibles that you find in the single player game, 
will unlock an extra feature in multiplayer mode:

Office multiplayer level: 2
Storage multiplayer level: 4
Raimi and Rabbit characters: 6
Medical multiplayer level: 8
Towel Girl and Bat characters: 10
Helipad multiplayer level: 12
Chef and Rat characters: 14
Raid multiplayer level: 16
Dead Garden multiplayer level: 18
Summit multiplayer level: 20
Volks and Roach characters: 22
Complex multiplayer level: 24
Heaven multiplayer level: 26
Boss multiplayer level: 28
Anna and Imp characters: 30
Catacombs multiplayer level: 32