Unlockable Characters
To be able to play as the Predator or the Referee you have to play through GP mode a certain amount of times.
Unlock The Predator as a Playable Character:
Finish GP mode once.
Unlock the Referee as a Playable Character:
Complete GP mode 2 times.
We have more cheats and tips for this game here, K-1 World GP 2006 cheats
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