Windows 3.0 :1990
Microsoft optimized the Windows 3.0 operating system, which still ran on top of DOS, for the 386 processor for a more responsive system. Windows 3.0 supported 16 colors and included the casual games familiar to most Windows users: Solitaire, Minesweeper and Hearts. Games that required more processing power still ran directly on MS-DOS. Exiting to DOS gave games direct hardware access made more system resources available that otherwise would have gone to Windows. Microsoft offered Windows 3.1 as a paid sub-release in 1993. Windows 3.1 features included support for TrueType fonts and peer-to-peer networking.