2007 - The Tanker Incident
Following the incident on Shadow Moses Island, Metal Gear's top-secret technology was leaked into the black market through the machinations of Revolver Ocelot. As a result, countless variations of Metal Gear have sprung up in every corner of the globe, making the weapon an increasingly common sight in the armed forces of nuclear powers.
In the midst of all this, Solid Snake, now a member of the anti-Metal Gear group "Philanthropy", has learned that a new prototype Metal Gear has been developed by the U.S. Marines and is being transported in secret to an unknown destination. To find out more about this prototype, Snake must infiltrate the transport as it makes its way down the Hudson River disguised as a tanker.
However, just as Snake is about to begin his mission, the tanker is seized by a mysterious armed group.
2009 - The Big Shell Incident The "Big Shell", a huge offshore cleanup facility constructed off New York's coast that serves as a symbol of environmental preservation, has been occupied by a terrorist group calling themselves the "Sons of Liberty."
The President, who was on a tour to inspect the facility at the time, has been taken hostage, and the Sons of Liberty have demanded a large sum of money from the government in exchange for his release. If this demand is not met, they have threatened to detonate a series of bombs placed around the Big Shell, releasing huge amounts of chemical toxins into the sea and unleashing a massive environmental disaster.
Faced with an unprecedented state of crisis, the government has called on the newly reformed FOXHOUND to handle the situation. FOXHOUND's chosen agent, Raiden, must single-handedly infiltrate the "Big Shell" from underwater and carry out a covert operation.
