Metal Gear Solid 2: Substance is a multi-platform updated version of the original MGS2 released for the PlayStation 2, as well as the Xbox 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.
The main addition of Substance is the inclusion of an extra missions mode with 300 virtual reality training missions set in a computer-constructed environment and 200 "Alternative Missions" set in areas taken from the main game. The player can choose to play these missions as Solid Snake or Raiden, with alternate outfits for both characters becoming available as the player progresses. Mission objectives include reaching the goal undetected, target practice, eliminating enemies, bomb disposal and a set of miscellaneous missions that include protecting a wounded ally from enemies or fighting a series of enemies. There are also a set of missions simulating a first-person shooter game.
In addition to th
e missions mode, there is also a set of "Snake Tales", which are five story-based missions featuring Solid Snake as the main character. This includes missions set in the Big Shell area from the Plant chapter, featuring characters such as Fatman, Emma, Vamp and Solidus Snake, as well as an alternate version of the Tanker chapter which replaces Olga Gurlukovich with Meryl Silverburgh (from Metal Gear Solid) as the boss. These missions, which are not canonical in respect to the main storyline, have no voice acting but are instead narrated via on-screen text.
The PS2 version also featured a skateboarding minigame based on Konami's Evolution Skateboarding game. The player can use Solid Snake or Raiden in a pair of Big Shell-themed levels and has to complete a set of objectives before time runs out. These objectives range from collecting dog tags scattered throughout the level to blowing up parts of Big Shell.
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. All three versions of the game were released almost simultaneously in Europe, the PS2 version being bundled with The Document of Metal Gear Solid 2 to once again make up for a substantial delay in its release. Only the PS2 version of Substance was released in Japan on December 19, 2002.
