We have 1 cheats and tips on PlayStation 2. If you have any cheats or tips for K-1 World GP 2006 please send them in here. You can also ask your question on our K-1 World GP 2006 Questions & Answers page.
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.