The original Windows Entertainment Pack (WEP) is a collection of simply-designed 16-bit computer games for Windows. These games were somewhat unusual for the time, in that they would not run under MS-DOS. Many of the games (still compatible with Windows XP) were later released in the Best of Microsoft Entertainment Pack. There were four Entertainment Packs in the original series. All games being 16-bit run on modern 32-bit versions of Windows but not on 64-bit Windows, except through a virtual machine. FreeCell, Minesweeper, Taipei and Chess from this pack were later bundled with Windows.