

This sound is not heard in Sons of Liberty. The intro of Substance now has a typewriter sound when a name is appearing on the main intro. Many changes were added to the main game. It features Snake and Raiden on the Big Shell. Exclusive to the PS2 version is the inclusion of a bonus skateboarding mode based on Evolution Skateboarding. Due to the low production value of these missions, there is no spoken dialogue (plots are narrated through on-screen text displayed at key points) and all of the enemies and areas are from the main game (the majority taking place in the Big Shell). Substance also includes five plot-based Snake Tales missions starring Solid Snake. In Missions mode, the player can choose between Solid Snake and Raiden, as well as five alternate versions of both (such as Raiden in the Cyborg Ninja exoskeleton or Snake in his original sneaking suit from Metal Gear Solid).

To rescue the imprisoned politicians there is a new agent FOXHOUND - Raiden.The main addition of Substance is the inclusion of nearly 500 stand-alone missions (similar to those from VR Missions/ Special Missions) with 300 missions set in a VR environment (including a set of missions played for a first person view) and 200 "Alternative Missions" (including bomb disposal missions) that take places in areas from the main game. Two years after the tanker's events, a sea sewage treatment plant 30 km from New York is taken over by terrorists calling themselves the Sons of Freedom. When Snake gets on board the ship, he discovers that Revolver Ocelot plans to steal Metal Gear with a group of Russian mercenaries. They learn that a new type of Metal Gear is transported across the Hudson River. Two years after the events on the island, Shadow Moses, Solid Snake and Hal Emmerich work together for Philanthropy - an organization fighting the production of new Metal Gear. One of the most important changes is the ability to choose a scene (chapter) from which we want to play Tanker or Plant. Metal Gear Solid 2: Substance is an extension to the Sons of Liberty version. Terrorists demand ransom for the life of the President of the United States and threaten to pollute the environment by destroying the object of the treatment plant if their demands are not met. The game's story revolves around the "Big Shell" wastewater treatment plant, which has been invaded by a group of terrorists known as "Sons of Liberty".

The game was released for PS (Windows), XBox and PlayStation consoles.

Metal Gear Solid 2: Substance, is an adventure game with tactical elemants released in 2002 by Konami.
