Unlock Devil to access gallery mode.
Tekken Bowl mode:
Unlock Ogre to access Tekken Bowl mode.
Successfully complete the game once to unlock Theater mode.
Successfully complete the game to unlock each secret character, which appear in the
Roger & Alex
Kuma & Panda
Mokujin & Tetsujin
Devil and Angel
Fight as Angel:
Complete arcade until Devil is unlocked. Then, highlight his screen and press Start.
Fight as Heihachi:
Complete arcade without losing in less than 5 minutes, 30 seconds.