Check out the enhanced and expanded CG trailer for the upcoming "Super Hero Squad Online" MMO!

Fight the evil forces of Doctor Doom with your favorite Marvel Super Heroes in Marvel's first free-to-play massively multiplayer online (MMO) game as Gazillion Entertainment and Marvel Entertainment announced today that Super Hero Squad Online is now live.

Check some of the featured SHSO characters, including Thor, Captain America, Spider-Man and others, and get ready to Hero Up for Marvel's first MMO in 2011!

Spider-Man tours Super Hero City in this brand-new video from "Super Hero Squad Online"!

A look at all the characters available to create the various Marvel teams found in Marvel: Ultimate Alliance. Choose from a cast of over 20 playable characters and then select an existing Marvel team such as the New Avengers, Fantastic Four, Marvel Knights--to name a few--or build your own! Plus, get a look at some of the killer cut-scenes from the game!

The Super Hero Squad must battle Thanos for the Infinity Stones! But they have new members, new powers and new challenges! Check out the first trailer for the "Super Hero Squad: The Infinity Gauntlet" video game, coming fall 2010.

Get a first look at alternate costumes and gameplay from "Super Hero Squad Online" in this special Halloween trailer!

Get the full rundown on who's who in this Final Character Roster Trailer for "Marvel vs. Capcom 3: Fate of Two Worlds"!

Watch the teaser trailer for the upcoming "Marvel Super Hero Squad" Nintendo Wii video game.

Hero Up on the go and in 3D with 'Super Hero Squad: The Infinity Gauntlet,' available fall 2011 for Nintendo 3DS!

Get in the holiday spirit with all your friends at "Super Hero Squad Online," and check out all the festive in-game decorations!

Learn more about the awesome Card Game mode in "Super Hero Squad Online," available to play now at http://www.HeroUp.com!

The Squaddies--including fan favorite Squirrel Girl in her first video game appearance--hero up in "Super Hero Squad: Comic Combat" for the uDraw GameTablet!

Check out tons of in-game action of Marvel's blockbuster game, featuring Luke Cage, Spider-Man, Iron Man and a fastball special, courtesy of Hulk and Wolverine!

Check out this awesome official launch trailer!!

The MVC3 trailer produced for Tokyo Games Show 2010 highlights epic combos, characters' first appearances and even showcases a few alternate costumes!

All your favorite heroes and villains from both universes square off in the final, epic cinematic trailer for "Marvel vs. Capcom 3: Fate of Two Worlds," on sale now!

Journey to Asgard in the new "Super Hero Squad Online" expansion pack, now live! Play as your favorite Thor characters and journey through the Nine Realms now at www.HeroUp.com!

Wield the power of the pen with THQ's uDraw GameTablet and Hero Up with Comic Combat available fall 2011!

Get the full roster of characters in this new trailer for "Ultimate Marvel vs. Capcom 3"!

Check out this special Halloween trailer for "Super Hero Squad Online"!