The game itself is a multiplayer shooter in the UT/Tribes/Halo vein: so that's men and vehicles (and jetpacks) (and dinosaurs) in a science fictional setting. They've done and given that demo the director's cut treatment, which you can ooh and aah at below: Since then, devs Spiral Games Studios have been beavering away at making their 'UT plus massive great dinosaur' dream a reality, most recently including a tech demo at the EG Expo. We've written about Orion before, back when its transition from HL2 mod to fully-fledged standalone man-shoot was originally announced.
Oh you boys and your zombies - don't you want something a little different? Something, say, featuring bus-sized, man-eating lizards? Dinosaurs, dinosaurs, dinosaurs, dinosaurs, dinosaurs, dinosaurs, dinosaurs.