While there aren't any cheats for Bejeweled 2, there are unlockable game modes within the game. To unlock them, simply complete the listed amount of levels in the correct gameplay mode.
Unlock Cognito Mode
- Complete all 80 Puzzle mode worlds.
Unlock Finity Mode
- Complete 280 levels of Endless mode.
Unlock Hyper Mode
- Complete 8 levels in Action mode.
Unlock Twilight Mode
- Complete 17 levels in Classic mode.
