Ballz 3D and Brutal: Paws of Fury are the only two known games that were intended to include support for the Edge 16, a modem add-on for the Sega Genesis developed in collaboration between PF Magic and AT&T that allowed for online multiplayer over phone lines. Though intended for release by the end of 1994, the Edge 16 never released, due to the upcoming fifth generation of consoles cutting the Genesis' lifespan short. Despite this, the North American manual for the Genesis version of Ballz 3D released with an entire section detailing how to connect to online matches using the Edge 16.