If you have received a consumer-ready retail version of the Oculus Rift on Monday March 28th onwards, and already own the game from Steam Early Access, please read below:

As a thank you for supporting us through Steam Early Access, you are entitled to an Oculus Store key code in order to download VR Karts for free.
Please note that this offer only extends until 30th June 2016.

Please send an email to ‘support @ viewpointgames dot co dot uk’ with your Steam receipt, Steam alias (the one to the right of Community if you open the Steam application) as well as any other evidence that you have to prove your purchase of the Steam Early Access version. Once we’ve validated your purchase, we will email you your key directly.

The VR Karts Early Access version will still be available if you own it and will still be playable on a DK2 with the 0.8 Oculus SDK.