Yakuza
Note: This game is also titled Ryuu Ga Gotoku.
Successfully complete the game to unlock the Premium Box, Movie Viewer, Adventure Review mode, and Battle Review mode.
Intentionally fail the game three times. After three retries, the game will ask if you want to play Easy mode. Note: If you select "Yes" you cannot return to Normal mode.
Get an "S" rank in all 50 missions in Battle Review mode to unlock Master Fighter mode. In this mode, you have unlimited heat.
Successfully complete all side quests and a secret Boss will appear in front of the movie theater. Talk to him to initiate the fight.
In the place where you plays slots, there is a "No. 1 Machine". It usually always gives good matches. Press R2 for the maximum bet, and press Down. Then, press Square, X, Circle.