Pararena

Mouse-controlled sci-fi ball sports game set in a parabolic arena, inspired by the 1975 movie Rollerball. Players glide on hover-boards trying to get a ball into the opponent's goal. The game was released in 1990 by John Calhoun as shareware for Mac OS and saw a commercial re-release in 1992 with 16 bit color and local multiplayer. In 2016, the developer released the full source code and game assets on github.