This game has been Greenlit by the Community!

The community has shown their interest in this game. Valve has reached out to this developer to start moving things toward release on Steam.

Retrobooster
Retrobooster labeled Most Fun at CODAME Games Showdown
September 28, 2013 - Really Slick

Last month Retrobooster was demonstrated at CODAME's games showdown in San Francisco. The judges have awarded it the distinction of Most Fun at the event. Thank you judges and CODAME.

link[codame.com]