Rex IRIX is the commercial version of the MSX2, and was originally released by Working Designs in October 1997 for $79.95 (US dollars). Rex IRIX is the first officially licensed MSX2 version, and also the first commercial MSX2 game. Rex IRIX was developed by Working Designs and published by Philips for the MSX2, MSX, PC Engine, Game Gear and Turbo Denshi 2C series. The game was first released as a cartridge for the Turbo Denshi 2C hardware and a CD-ROM for the MSX2, MSX, PC Engine, and Game Gear hardware. Rex IRIX also includes a MSX Basic and BASIC D extension ROMs for the MSX to extend BASIC and the MSX Basic/D extensions. Rex IRIX was later ported to the SuperFX by Compile for the SuperFX board by the company SyncRPG, and a few years later also to SNES by Konami and to Game Boy Advance by Konami as well. The Game Gear support is only the 3D engine with graphics and sound courtesy of Konami, and the PC Engine support is only the music. The game was not ported to PC due to the high cost of porting to PC in the early 90's. In 1997, Rex IRIX was re-released as the second edition of the Super NES game, and in 2006 released as Rex IRIX Super Plus for GameCube, Game Boy Advance and Game Boy Advance SP. In 2007, Rex IRIX was ported to the Nintendo Wii as Rex IRIX Turbo.