Yakuza PS2 Cheats

Completion Bonuses:

Beat the game to unlock the Premium Box, Adventure Review mode, Battle Review mode, and the Movie Viewer.

Master Fighter mode:

Get S-rank in all 50 Battle Review missions.

Hidden Boss Fight:

Finish all side-quests and talk to the boss who appears in front of the movie theater.

Easy mode:

Intentionally fail three times and the game will prompt you to switch to easy mode.

Thanks to Revolution Readers Chapino and Loki!