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 Demo Updated to Version 0.7.5
August 26, 2013 - Really Slick

Go download the latest free demo and blast some aliens.

Downloads[www.reallyslick.com]
Details about update[www.reallyslick.com]