The first of the legally licensed commercial adaptations were released in 1985 with the release of Monopoly for the BBC Micro, Amstrad CPC and ZX Spectrum. Over the years, Monopoly has been released for different operating systems on the PC and Macintosh platforms. Also, versions have been licenced and produced for the NES, Super NES, Game Boy, Game Boy Advance, Nintendo 64, Nintendo GameCube, PlayStation, PlayStation 2, Sega Master System, Sega Genesis, Xbox, Xbox 360, PlayStation 3, PlayStation Portable, and Wii consoles, as well as mobile device (PDA/Smartphone) versions. The game plays by the same rules as the standard board game, and allows for single or multiplayer games. When a single player game is chosen, the game would generate computer-controlled opponents.