Unigine OilRush is available from their online store, Desura, Steam, and the Ubuntu Software Center at its $19.95 USD DRM-free price. The game weighs in at just over 800MB.
Below is the original OilRush trailer for those still not familiar with this Unigine game. Hopefully this is just the beginning of the exciting projects coming out of Unigine Corp.
Find out more about this game at OilRush-Game.com or visit Unigine.com to learn about their amazing cross-platform engine (it works on Android too) and the many Phoronix articles with various exclusives.