They’re classics. They’re new from Xbox LIVE. And they’re free!

Prepare to start wasting some serious time, people. Two of the most immensely popular puzzle games of all time—the PC classic Minesweeper and the newspaper staple Sudoku—just landed in the U.S. Marketplace for Windows Phone. But these aren’t just any versions of the classic games. They’re official Xbox LIVE editions—so now they come with all kinds of cool powerups and achievements.  Best of all? These ad-supported titles will cost you nothing (except your workday).

Download Xbox LIVE Sudoku

Download Xbox LIVE Minesweeper

The goal in Minesweeper is to clear the board using flags to safely mark potential hidden mines. One wrong move and it’s game over. The new Xbox LIVE version comes with two modes—Classic and Speed—and as many as 4 different levels of difficulty each.  Sudoku, the hit Japanese numbers-based logic game, challenges you to fill a 9×9 grid with the numbers 1 to 9. (But of course it’s not quite as simple as it sounds.) Play it in Classic or Lightning mode.

Xbox LIVE Minesweeper is new for Windows Phone and totally free.Xbox LIVE Sudoku is new for Windows Phone and totally free.