Tux Racer is a 2000 open-source winter sports racing video game starring the Linux mascot, Tux the penguin. It was originally developed by Jasmin Patry as a computer graphics project at the University of Waterloo. Later on, Patry and the newly founded Sunspire Studios, composed of several former students of the university, expanded it. In the game, the player controls Tux as he slides down a course of snow and ice collecting herrings.

An open-source video game, or simply an open-source game, is a video game whose source code is open-source. They are often freely distributable and sometimes cross-platform compatible.