Audiosurf 2 on Steam Early Access
Audiosurf is the one of the few games in which you can upload your favourite music and play a rhythmic surfing game while listening to your most beloved track. The second game in the series is now available for early access exclusively on Steam.
The full game will run you only $17.99 so if you really liked the first one, you should try this one too as it seems to be way better. So prepare your favourite tracks and start audio surfing!