MIG-31

Candella Systems and Eipix Entertainment have released a playable demo for Pyroblaze, giving you the chance to try out the PC version of this futuristic combat racing game now available via Direct2Drive. Set amidst the awe-inspiring locations of New Apeiron, players get the opportunity to race through a multitude of environments using a wide selection of anti-gravity craft known as Blazers. In their quest for glory, players can blast their way through the scorched valleys of Gnosis, the deserted cities of Haedra or the densely populated Underdome of Evelads. As the players fight their way through the championship, improved Blazers with better speed, handling and superior firepower become available. Players also have the ability to pick up weapon and ammo upgrades during the race, further enhancing their ability to land the killer blow.
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Download: Gamershell

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Nachbrenner

Albeit the game uses the current PhysX SDK 2.8.1 (not the latest revision though), i don't see any difference between GPU PhysX enabled and disabled