On Xbox Live Arcade today: Duke Nukem: Manhattan Project and RISK: Factions. Free Red Dead Redemption co-op pack

Get an Xbox 360 Live 1600 Points CardFrom today, at 9AM GMT (2AM PDT), you can play 3D Realms’ Duke Nukem: Manhattan Project on Xbox Live Arcade for Xbox 360. Duke Nukem: Manhattan Project will be available worldwide for 800 Microsoft Points (that’s US$10 / €9.60 / £6.80 / CAN$12.40 / AU$13.20).

Duke Nukem is back in Duke Nukem Manhattan Project! New York City is being overrun by a mutant menace and it’s time to de-worm the Big Apple. This explosive 3-D action game features the politically incorrect action hero defending the city that never sleeps, and its babes, from the evil Mech Morphix across 24 levels from Chinatown to Space. A super-sized collection of weapons, enemies and bosses await. As Duke would say, “Babes, bullets, bombs. Man, I love this job!”

Watch some Duke Nukem: Manhattan Project launch trailer:

Also available today is EA’s RISK: Factions on Xbox Live Arcade for Xbox 360. RISK: Factions will be available worldwide for 800 Microsoft Points (that’s US$10 / €9.60 / £6.80 / CAN$12.40 / AU$13.20).

RISK: Factions promises to offer innovative ways of experiencing the timeless turn-based board game in both objective-based and world conquest modes. Players will be able to engage as one of five playable factions, each with different strengths, as they wage war on new maps with dynamic terrain in their quest for missile silos in order to strategically dominate the game. Additionally, as rivals go head-to-head during unique, animated combat missions, enemies will be able to trigger “Overkill” moments, based on the roll of the dice, and unlock avatar awards while attempting global supremacy. With a new animated art style, kooky humor and a choice of five oddball factions, RISK: Factions is sure to offer something for veteran RISK strategists and newcomers alike.

Watch the RISK: Faction gameplay explanation trailer:

The Deals of the Week are: 7 different deals centered around sports and are now available for Xbox LIVE Gold members:
“FIFA 10 Ultimate Game Mode, 240 Points
Madden NFL Arcade, 800 Points
NBA 2K10 Draft Combine, 240 Points
Football Genius, 400 Points
Sensible World of Soccer, 400 Points
Soccer ball Xbox LIVE Avatar prop, 80 Points
MLB Stickball, 400 Points”

New Games on Demand: Mirror’s Edge and Bee Movie Game in all Xbox Live regions.

The newest demos to appear on Xbox Live Gold member’s Marketplace are: the Crackdown 2 Demo (everywhere except Germany) and NCAA Football 11 Demo (only in USA and Canada).

The latest Xbox 360 Game Add-ons are:
* Red Dead Redemption – ‘Outlaws to the End’, FREE!

* Battlefield Bad Company 2 – Onslaught Mode, 800 Points

* The Tuk Tuk Boom Boom canon-mounted vehicle, FREE!

* Hasbro Family Game Night: Jenga, Pictureka! and Connect 4×4, 800 Points each