Looking to bolster your games collection on your Windows Phone on the cheap? Today, Microsoft has announced that ad-supported versions of Minesweeper and Sudoku are available to download, free of charge, right now on your Windows Phone 7 device. There's only one stipulation: you've gotta be a US resident.

Both titles feature Achieviements and multiple modes of play -- in Sudoku, you've got Classic or Lightning mode, while Minesweeper boasts Classic and Speed modes. You can download each by following the links below.

[Thanks, Curtis]