Microsoft Mahjong, previously known as Mahjong Titans and Taipei, is a mahjong solitaire computer game brought to you by Microsoft. Originally featured in Windows Vista and Windows 7, this game offers a refreshing take on the classic tile-matching puzzle. With a variety of tile sets and backgrounds, Microsoft Mahjong capitalizes on the enhanced graphical user interface of Windows Vista. Although not part of Windows 8, a standalone version is available for free download from the Windows Store, developed by Arkadium and published by Microsoft Studios.

In its earlier iterations, Microsoft Mahjong was known as Taipei and was included in Microsoft Entertainment Pack 1 and Best of Microsoft Entertainment Pack, offering a staggeringpossible configurations for endless gameplay.