Unigine is a cross platform, real time 3D game engine. The engine is capable of producing advanced realistic 3D effects and game physics.
Oil Rush, the first game to based on Unigine is quite popular and it runs really well on Linux. Many other Unigine based games have confirmed Linux support including a fantasy RPG, an adventure game and an MMORPG.
Now in a latest video, Unigine Corp has shown impressive new features of the engine and advanced graphics. Check it out:
If you want to see the engine yourself on a Linux system, download their benchmark utility Heaven from here.