AGEIA today announced that the multiplayer shooter CellFactor: Revolution, originally announced as a retail game, will be released for free May 8. Most parts of the physics heavy game will require a PhysX PPU, but people without such a card (which is...almost everyone) will be able play two levels against AI enemies.

The game will automatically detect players with a PhysX card, offering them the option to progress through the single-player campaign mode that includes three "extreme PhysX" levels. PhysX users can also challenge humans and AI-enemies in four LAN-based multiplayer modes. Gamers who do not have a PhysX processor will be able to fight artificial-intelligent controlled enemies in the multiplayer "skirmish" modes, in two environments. The extreme PhysX levels were designed to spotlight physics gameplay with a purpose. For example, oil leaking from a barrel may be an indicator of its volatile nature, a spider web twitch can indicate nearby movement, lava can be psionically harnessed to deflect or smother enemies, and particle beams can be used as weapons.