Sony Computer Entertainment America (SCEA) is offering exclusive games on PlayStation Network (PSN) every Tuesday starting this month. Gamers in North America who download games or make purchases worth up to $60 using their PlayStation Network/SEN Wallet can earn $10 store credits in November.

The initial "Only On PlayStation Network" games to be released on Tuesday are Eufloria and Rochard. Eufloria is game of space exploration and conquest, plant growth and bio mechanical evolution. Players conquer asteroids in deep space and use their resources to literally grow and nurture semi-organic plants and creatures.

In Rochard, players use gravity to solve environmental puzzles and advance through each level.

On Oct, 11, Sideway: New York will be available. Here, players help rescue friends and defeat Spray, a sinister tagger who wants to dominate both Sideway and the real world.

Okabu and RocketBirds will be released on Oct. 18. In Okabu, players guide Kumulo, Nimbe and four cloud-flying heroes in a battle to save their people and their world from the industrialized threat of the Doza.

In RocketBirds, the aim is to annihilate an evil penguin regime using a slew of weapons.

On Oct. 25, PSN gamers can try infamous: Festival of Blood and PixelJunk Sidescroller. In inFAMOUS, the object is to kill the head vampire to prevent the bitten superhero Cole MacGrath from turning into one. PixelJunk Sidescroller involves dodging alien bullets and upgrading weapons while battling stages of hazardous fluid and endless shooting mayhem.

"'Only On PlayStation Network' is our line of great exclusive games that users can count on to deliver exciting game experiences that can't be found anywhere else," said Susan Panico, senior director of PSN, according to a press statement from the SCEA. "This strong initial content offering, combined with the day one discounts for PlayStation Plus subscribers and the 'Spend $60, Get $10 Back' promotion, makes PlayStation Network the premier destination for digital content."

PSN, is an online multiplayer gaming and digital media delivery service provided/run bySony Computer Entertainment for use with the PlayStation 3,PlayStation Portable and PlayStation Vita video game consoles.