Phoronix has posted a review on Title: PlanetPenguin Racer v0.5 ALPHA

Whether your in search of a great OpenGL racing game to play in your time off, or would rather enjoy supporting open-source gaming projects, today we have some screenshots of the latest PlanetPenguin Racer v0.5 ALPHA release. Among various major improvements, the TCL scripting is replaced by Squirrel and now features experimental multi-player support. PlanetPenguin Racer, of course, is based upon the GPL version of the popular TuxRacer game.

PlanetPenguin Racer v0.5 ALPHA Review