With Sony Bend's Resistance: Retribution (PSP) now at North American retailers, publisher Sony Computer Entertainment has paired with community site Global Gaming to throw an online multiplayer tournament for the portable third-person shooter.

Registration opens today and runs until May 10, 2009. Two ladders, 2v2 and 4v4, are open. Combined, the two brackets offer over $25,000 in prizes for U.S. gamers.

The actual tournament portion begins on April 8, with winners declared May 31. Oddly, some of the prizes include a PSP--something you'd think participants in a tournament for a PSP game would already have. The listed prizes follow below... Read more

Sony has announced that a demo of Resistance: Retribution (PSP) is now available for fans that pre-order the game through a specific list of retailers.

The participating retailers include Amazon, Best Buy, GameStop, or Game Crazy. After pre-ordering the game, the demo can then be downloaded from the PlayStation Store with a voucher code.

The shooter demo will feature single and multiplayer gameplay, as well as the game-changing Infected mode. Players will also have a chance to try out Resistance: Retribution Plus, which allows users to play the game on a PlayStation 3.

Resistance: Retribution is set for a March 17 release.

These Resistance: Retribution (PSP) screens illustrate a scene that any gamer fears: being entirely unprepared for a big fight, running out of ammo, and resorting to a puny handgun.

The PSP shooter, set to feature eight-player online multiplayer and PS3 connectivity, will be released this spring.

Sony Bend is releasing its PSP Resistance game this spring, and we now have a better look at it thanks to the following screenshots. Resistance: Retribution takes place between the events of Resistance and Resistance 2, following a British resister in his fight against the alien Chimera.

The portable shooter will feature eight-player online multiplayer and PS3 connectivity when it is released this spring.

Sony's Bend Studio, developer of the PSP shooter Resistance: Retribution, borrows more than the name from Insomniac's PS3 shooter series. The handheld game can be modified by Insomniac's upcoming Resistance 2 if connected to a PlayStation 3.

"Once you connect to [Resistance 2], Resistance: Retribution becomes 'Infected,'" exclaims a presentation slide from the Tokyo Game Show appearing on the PlayStation Blog. The Infected version of Retribution grants an alternate storyline, health regeneration, underwater breathing, and weapons borrowed from the PS3 game.

While connected to a PS3, Retribution will also support the DualShock 3 controller. With the console controller, auto-aim is turned off and the difficulty is ramped up while vibration support is enabled. Players can also use the PSP-2000 and 3000's video output feature to replicate a traditional console experience.

On an aside, seven new screenshots for Retribution were released, which can be found on Shacknews. The portable shooter is still on track for a spring 2009 release.

A PSP Reistance title developed by Sony Bend was today revealed at Sony's E3 event.

The title utilizes a third-person behind-the-back and over-the-shoulder view to recreate the first-person action of Insomniac's PlayStation 3 entries.

Dubbed Resistance: Retribution, the game is expected in spring 2009.