Deep in South Africa, 200 kilometers North of Galzburg, Outer Heaven born. An armed fortress nation established in late 80's by a mercenary who was at the same time a hero and a maniac.
Something is happening in this OUTER HEAVEN.
A massacring weapon that could change the world forever is reported to be under development.

The Fox-Hound group sends an agent called "Grey Fox" to gather data about this ultimate weapon. However, several days later, after his final report "Metal Gear...", his contact was lost. The disappearance of Grey Fox perhaps supports the rumors of the ultimate weapon.

Unit Fox-Hound is called to duty once again!

The intruder of this time is a rookie soldier named Solid Snake who joined FOX HOUND quite recently. His mission is to locate the whereabouts of Grey Fox, find out the identity of Metal Gear and destroy it.
Solid Snake is sent to his first battlefield with nothing but a wireless radio at his hand.
Superlative mercenaries from all around the world are said to have gathered in Outer Heaven. Can Solid Snake accomplish his mission?
The voice of the commander-in-chief of Fox-Hound, Big Boss, came out from the wireless radio.
"Solid Snake! This is not a cadet, it's a real war. I'll wish you good luck..."
Solid Snake started hearing the sound of gunfire in his head.....