The 1.6.4 version of ExtremeTuxRacer for Mac was available as a free download on our website. This free Mac application is an intellectual property of jpenguin. The bundle id for this app is jpenguin.etr.plist. ExtremeTuxRacer for Mac lies within Games, more precisely Racing. The most popular versions among ExtremeTuxRacer for Mac users are 1.6 and 0.4.
From the developer:
ExtremeTuxRacer is a downhill racing game featuring Tux, the Linux Penguin. It is a free, open source game.
You may want to check out more Mac applications, such as Off-Road Velociraptor Safari, 3D American Truck or Vip Anarchy, which might be related to ExtremeTuxRacer.