Tear yourself away from GTA IV for a minute and check out footage of Solid Snake in Metal Gear Online. The "Sneaking Mission" mode was recently added to the beta and it rocks.
It features Metal Gear Solid 4's Solid Snake in all of his elderly glory, sneaking around battlefields to collect dog tags from enemy players.
It gets more complicated because the enemy players can win if their team kills Snake 3 times. They can also win by killing the opposing team a set amount of times.
Playing as Snake is an incredible challenge and requires you to put your MGS skills to the test against human opponents.