Valve has released a new beta version of their classic first person shooter Half-Life 2 with Oculus Rift VR support. While the game was previously playable on the Rift via the Vireo Perception display driver, this official support means you can now look around the map and aim separately from where you are looking.
Valve also previously released Team Fortress 2, which became the first full game to have Oculus Rift support. Much like that implementation, you'll have the option of a variety of different control options at your disposal so you can see which one works best for you. Since VR gaming has literally just now hit the mainstream, it's too early to say what type of control scheme is going to emerge as a standard in these types of experiences.
The VR support for Half-Life 2 is still in beta, and Valve notes that the implementation is a little more rough that what they did with Team Fortress 2. You'll still need to activate it and select control modes by using console commands, but it's all pretty straight forward. Lucky people who've already scored an Oculus Rift dev kit are going crazy for it, saying it's the best VR experience to come so far. Not surprising, since Half-Life 2 is arguably the best first person shooter of all time.
Check out some gameplay footage below to see what it's like, although I'm sure it's much cooler if you're actually wearing a Rift.