The updated Duke Nukem 3D will not only features 8-player online co-op, but will also allow you to capture multiplayer battles and share with other XBL users, as well as a rewind function in singleplayer to relive (or redo) those climactic firefights, all shown in old school graphics (but with new graphics in the menus, and the HD sidebars).

2K Sports announced MLB Stickball, an exciting, fast-paced, multiplayer game that puts gamers against each other to see whose team can win a classic game of stickball.

Love puzzle games, but also love an adventure? Now you can have both in one game with Henry Hatsworth in the Puzzling Adventure, an adventure-puzzle game that adds a new element of fun by combining the action of an adventure game with the challenge of a puzzle game all in one.

Red Faction: Guerrilla is a open-world third-person shooter set 50 years after the climactic events of the original, returning to Mars and once again re-defining the limits of destruction-based game-play. Starting today, fans can participate in a community contest to create the final multiplayer-based Achievement/Trophy that will ship with the game.

LEGO Batman features all of the characters from the LEGO Batman construction sets, plus a few new additions. Gamers will have the ability to roam the streets of LEGO Gotham City as Batman or Robin, and even take control of the villains while manipulating gadgets and building/operating vehicles in co-op gameplay.

Join the Peggle Masters on a dreamtime adventure of alter egos and peg-tastic action. Stay up late to aim, shoot and clear orange pegs from over 60 levels, and bask in Extreme Fever glory. Then, take on 60 Challenges for even more rebounding joy!

Zoo Vet: Endangered Animals is a new simulation game set in an urban zoo where you test your skills as an animal doctor. Using your stylus, give check-ups, treat major and minor illnesses, and even perform surgeries.

Far Cry 2 immerses players in an entirely new kind of gaming experience, where players will discover a true open world gameplay set in one of the most beautiful environments in the world, Africa, brought to life by high-definition next-gen technology.

Guitar Hero: World Tour will feature guitar, vocals, drums, the ability to create your own songs (and upload them on GHTunes), four-player on/offline co-op, and an eight-player battle of the bands multiplayer mode (4vs4).

In the last few weeks Microsoft has been ramping up its internal development teams, even though it will be closing Ensemble Studio soon, as not only did it recently recruit Bungie's Frank O'Connor, and Gearbox's tech programmer Corrinne Yu, but also former MGS 4 producer Ryan Payton. In a recent interview MGS head Phil Spencer revealed that all this is not just for one particular title or other, but that MGS has "more than two or three teams building Halo things right now."