Metal Gear Solid 2: Substance is a multi-platform updated version of the original MGS2 first released for the Xbox, then followed by PlayStation 2 and PC. The game contains the main Sons of Liberty game with some subtle alterations, as well as the inclusion of Boss Survival and Casting Theater modes from the Japanese and PAL versions of the original game. It also includes a variety of VR Missions, Snake Tales and a Skateboard minigame (exclusive to PS2). Substance was originally released as an Xbox timed-exclusive in North America on November 5, 2002. The PS2 version was released on March 2003 and released alongside the PC version.