GameSpot writes: "One of the staples of the past several Tokyo Game Shows has been Metal Gear Solid 4. Oddly enough, Snake and company have made their return to the event this year, despite the fact that MGS4 was released several months ago. The reason for this comeback? Metal Gear Online, Metal Gear Solid 4's online multiplayer component, will see the release of a new expansion pack this November. Titled the "Meme Expansion," this new download will add three new maps, Liquid Ocelot and Mei Ling as playable characters, and a new Tournament Mode. The Meme Expansion is playable on the show floor, and played a few rounds to get a quick peak at what this new material is all about."