Microsoft integrated games into the Windows operating system from its early versions, starting with Reversi in Windows 1.0 in 1985 and introducing Solitaire in Windows 3.0 in 1990. Over the years, various versions of Windows included a range of built-in games, peaking with Windows Vista and Windows 7, which featured titles like Chess Titans and Mahjong Titans. However, with the release of Windows 8, Microsoft removed classic games from the operating system and transitioned to an app-centric model, directing users to the Windows Store for gaming. The Microsoft Solitaire Collection became a single app, while other games were made available as separate downloads. This shift marked a change in how Microsoft approached gaming, moving from integrating games as part of the OS to treating Windows as a platform for independent applications and services.