Mass Effect 2 lands on PSN

Leading the charge this week is Commander Shepard's PlayStation 3 debut. Mass Effect 2 ($60) is now available as a 12GB full game download via the online marketplace. The game includes three of the game's previously released downloadable content packs: Overlord, Lair of the Shadow Broker, and Kasumi. For more on the PS3 version of the game, check out GameSpot's review of Mass Effect 2.

Also out now for the PS3 is Spare Parts ($10). From EA Bright Light, the title is focused on two robots--Mar-T and Chip--who are dumped out with the garbage on an alien planet. In the title--which supports both on and offline co-op--players must explore the planet, defeat enemies, and locate parts for an abandoned ship that they will pilot home.

For the shooter enthusiast, Gameloft's Modern Combat: Domination ($8) is now available to download. The online first-person shooter supports 16-player battles, leaderboards, and Sony’s motion-control peripheral, the Move. Additionally, the game sports five multiplayer maps and six game modes to participate in.

Gamers wishing to add to their existing titles can now download new content for Assassin’s Creed: Brotherhood and R.U.S.E. Brotherhood welcomes the free Animus Project Update 2.0, which adds a new multiplayer environment called Pienza, as well as a Chest Capture game mode, where teams of three must seek out and steal the opposing faction's chest.

As for the World War II strategy title, R.U.S.E. welcomes the Chimera Pack ($10). The add-on content packs in fresh content for the game's single- and multiplayer components. Three new multiplayer environments are available in the Chimera Pack, and three new challenges for the solo campaign are packed into the content.

Those looking to the past for their fun can now download two new PSOne Classics, the first of which is Metal Slug X ($6). The run-and-gun shooter is full of deadly weaponry, enemies, bosses, and vehicles. The other PSOne Classic out now is Mega Man ($6). From Capcom, the game thrusts players into the cybernetic boots of hero Mega Man, as he takes on Dr. Wily and his robot master minions.

Switching to the PSP storefront, Sony this week added seven new $7 titles to its recently launched NeoGeo Station. This week's titles are Alpha Mission II, Art of Fighting, Baseball Stars Professional, League Bowling, Magician Lord, Super Sidekicks, and The King of Fighters '94.

Gamers looking for new music to rock out to this week can download new tunes for Rock Band 3, DJ Hero 2, and Def Jam: Rapstar. Rock Band 3 welcomes a triple shot of Corey Taylor-led Stone Sour tunes; DJ Hero 2 adds the Trance Anthems Mix Pack ($8); and Def Jam: Rapstar welcomes songs from LL Cool J, Lloyd Bands, N-Dubz, Shawty, and Nitti Beatz.

A full list of the week's deals and new PlayStation Store content, including themes, wallpapers, demos, discounts, and add-on content, is available on the PlayStation Blog.