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 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? They’re both totally free.

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 9x9 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.