Currently, nine games can be found by searching for VR support in Steam. Highlights include the Valve Complete Pack, Surgeon Simulator 2013 and Strike Suit Zero. Notably absent from the list is Euro Truck Simulator, though its omission could either be the result of the search query still being fleshed out, or because the game's Oculus Rift support is still in the testing phases.
It should go without saying, but if you want to experience these games in their fully immersive glory, you're going to also need to own an Oculus Rift headset. Unfortunately we still have no pricing or release date information for the gadget.
(Image credit: Sergey Galyonkin)