Billed as "the first and only Sudoku game" on Xbox Live, Buku Sudoku includes more than 1,200 number-crunching puzzles along with multiplayer for four offline or eight online players. Carrying a price tag of 800 Microsoft Point ($10), the game also packs a competitive multiplayer that lets players affect an opponent's puzzle.

Essentially four-player Pong, Stainless Games' update of Atari's Warlords brings with it modern HD graphics and a "pixel-perfect copy of the original." In order to beat those three online, offline or AI opponents, you'll have to pony up 400 Microsoft Points ($5).