Unlock Cognito mode:
Finish all 80 Puzzle mode worlds.
Unlock Finity mode:
Finish 280 levels of Endless mode.
Unlock Hyper mode:
Finish 8 levels in Action mode.
Unlock Twilight mode:
Finish 17 levels in Classic mode.
Gamerscore point tasks list:
Get to level 9 in action mode - Action Mode
Get a x8 cascade during any game mode - Cascade 8
Get to level 18 in classic mode - Classic Mode
Collect 50,000 in Cognito Mode - Cognito Mode
Finish level 280 in endless mode - Endless Mode
Get to level 9 in finity mode - Finity Mode
Get to level 9 in hyper mode - Hyper Mode
Make 1,000 power gems across all your games - Hyper1000
wilight, Hyper, Cognito, and Finity mode. - Multi Mode
Make 10,000 power gems across all your games - Power10000
Finish all 80 levels in puzzle mode - Puzzle Mode
Finish lvl 10 in twilight mode - Twilight Mode
Remove backround grid or change jewel types:
Hold LT + LB + RT + RB and press B - remove grid
Hold LT + LB + RT + RB and press A - chage jewel types