Hold LT + LB + RT + RB and press A.
Hold LT + LB + RT + RB and press B.
Choose the "Play Game" option, then select the following options in order repeatedly: "Classic", "Action", "Endless", then "Puzzle". After several cycles, the message "Please Wait" will appear and a version of the game similar to the original Bejeweled will begin.
Successfully complete all 80 Puzzle mode worlds to unlock Cognito mode.
Successfully complete 280 levels of Endless mode to unlock Finity mode.
Successfully complete 8 levels in Action mode to unlock Hyper mode.
Successfully complete 17 levels in Classic mode to unlock Twilight mode.
Accomplish the indicated achievement to get Gamerscore points: