The Xbox Live Marketplace has been updated with some new content over the past couple of days. The highlight of the update is the new Rock Band content, including the hilarious cover of Lady Gaga’s Poker Face by South Park’s Cartman. Here is the full Xbox Live Marketplace Update for Monday 15th - Wednesday 17th March 2010:

Xbox Live Arcade
Perfect Dark
Price: 800 Microsoft Points (Free Trial available)
Size: 239 MB
(ONLINE INTERACTIONS NOT RATED BY THE ESRB) Buy the full version of Perfect Dark to unlock the classic package in its entirety. Experience every twist of the story, every stray bullet, every gadget and upgrade, every newly polished texture – and top it all off with full access to multiplayer modes now playable across the globe through Xbox LIVE. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.

Game Content
Sonic & SEGA All-Star Racing: Unlock All Characters & Tracks
Price: 400 Microsoft Points
Size: 108 KB
Race past the competition and speed your way to victory with a whole host of Sonic & SEGA All-Star characters and exhilarating tracks. Unlock all 24 tracks and 22 characters from the start with this exclusive download. Winning has never been so sweet! There are no refunds for this item. For more information, see www.xbox.com/live/accounts.

Rock Band: Lady Gaga Pack 01
Price: 560 Microsoft Points
Size: 166 MB
Lady Gaga Pack 01. This pack includes "Monster," "Poker Face," "Bad Romance," and "Just Dance" by Lady Gaga. PLEASE NOTE: Rock Band game disc is required to play song game tracks. This song game track pack includes six song game tracks at a discounted rate over individual purchases. Many Rock Band songs are available as both a multipack and as a single game track. These songs are exactly the same (unless expressly noted). It is possible to download the same song twice. For song credits, visit www.RockBand.com. There are no refunds for this item. For more information, see www.xbox.com/live/accounts.

Rock Band: "Poker Face"
Price: 160 Microsoft Points
Size: 43 MB

Rock Band: "Monster"
Price: 160 Microsoft Points
Size: 41 MB

Rock Band: "Just Dance"
Price: 160 Microsoft Points
Size: 38 MB

Rock Band: "Bad Romance"
Price: 160 Microsoft Points
Size: 44 MB

Rock Band: "Lady Gaga's 'Poker Face' (South Park Version)"
Price: 160 Microsoft Points
Size: 39 MB

Rock Band: "Rock & Roll Queen"
Price: 160 Microsoft Points
Size: 20 MB

Rock Band: "Oh Yeah"
Price: 160 Microsoft Points
Size: 21 MB

Rock Band: "Control"
Price: 160 Microsoft Points
Size: 28 MB

Rock Band: "It's Not My Time"
Price: 160 Microsoft Points
Size: 28 MB

Game Videos & Trailers
Crackdown 2 - Fun With Friends
Price: Free
Size: 173 MB
Take a deep dive into Pacific City as Ruffian Games Creative Director Billy Thomson, Producer James Cope, Senior Engineer David Hynd and Senior Mission Designer Dean Smith reveal what it takes to design a living, breathing sandbox world with the most gripping multiplayer experiences yet, including 16-player PVP and 4-player co-op. The video documentary also shines a light on some of the extraordinary antics and mayhem that players can look forward to, including Renegade Orbs and the PVP mode called Rocket Tag, when they bring their personal brand of justice to Pacific City this July. (Not Rated)

Metro 2033 - Launch Trailer (HD)
Price: Free
Size: 94 MB
Epic first-person action and adventure in post-apocalyptic Moscow. (Not Rated)

BRINK: The Official Trailer (HD)
Price: Free
Size: 148 MB
Watch the security and resistance battle it out for glory in this stylish new Brink trailer. (Not Rated)

Extended Medal of Honor Announce Trailer (HD)
Price: Free
Size: 96 MB
Operating directly under the National Command Authority, a relatively unknown entity of handpicked warriors are called on when the mission must not fail. They are the Tier 1 Operators. (Not Rated)