In 1974, Snake (a.k.a. Big Boss) is no longer part of the US special forces and has his own merc team. While on a mission in South America, they encounter a strange hostile merc unit with far superior equipment than their latest tech.
"MGS4" brings a totally new concept and situation, resulting in the toughest "Metal Gear" infiltration mission ever devised. The game is set after the events of "MGS2" and players will reprise the role of top secret agent Solid Snake.
Niko Bellic comes to Liberty City, America to live the good life, but ends up having to assist his dangerously indebted cousin Roman with his financial troubles, by any (mostly illegal) means necessary.