Dirt Rally was originally released back on Dec 7, 2015. Since then, there has been some support for the Oculus Rift, but no official support. The game supported the DK2 but required many tweaks to get it working, detailed here.
Today, developer Codemasters release the official Dirt Rally game with full Oculus Support from either Steam or the Oculus Home store.
Codemasters state the VR update will be a free update for everyone who owns the PC version of the game. The game is $59.99 from Steam or Oculus home.
If you're a Nvidia user, then you'll need to download the latest game ready driver from their site or Nvidia control panel.
Download Nvidia Dirt Rally Game Ready Driver for VR
About Dirt Rally
DiRT Rally is the most authentic and thrilling rally game ever made, road-tested over 80 million miles by the DiRT community. It perfectly captures that white knuckle feeling of racing on the edge as you hurtle along dangerous roads at breakneck speed, knowing that one crash could irreparably harm your stage time.
DiRT Rally also includes officially licensed World Rallycross content, allowing you to experience the breathless, high-speed thrills of some of the world’s fastest off-road cars as you trade paint with other drivers at some of the series’ best-loved circuits, in both singleplayer and high-intensity multiplayer races.