This iteration of the game features the same basic engine, models, textures, and artwork, but with significantly different game mechanics, gameplay, and storyline. A port was also released on Mac OS X on December 19, 2003. Due to the console version's success on the Xbox and the popularity of its subscription-based online multiplayer service, Xbox Live, an Xbox-exclusive semi-sequel was released in 2004 titled Rainbow Six 3: Black Arrow.