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Playstation 2 - City Crisis cheats

Unlock Bat and Pork as playable
Finish all "Rescue" missions once

Unlock time attack mode and final rescue mission
Finish all "Chase" missions

Disaster mode
Reach an "S" rank in the last rescue mission

Unlock chase car mode
Reach an "S" rank in the bus chase and minimum an "A" rank in 
all "Rescue" missions.

Unlock Final Rescue Mode
Reach an "S" rank with the Sports Car.