About Zero Tolerance

Run around and shoot terrorists ala Doomenstein 3D. Or you and a friend can shoot each other.

This game is most definitely NOT PUBLIC DOMAIN. The copyright and trademarks for Zero Tolerance are owned by Randel Reiss. Reiss who has made the original Zero Tolerance Sega Genesis ROM available for royalty-free distribution. But, portions of the ROM image are copyrighted by Sega and no license or permission to redistribute beyond the publishing and sale of the original cartridge has been grated by Sega. Downloading Zero Tolerance is illegal, a felony punishable by up to $150,000 (plus the direct value as determined by Sega of every copy made in violation) and up to 10 years in prison by US code Title 17-(1), 506(a)(1)(C). Copyright is enforced against non-US violators via international treaty. Distributors and downloaders are simply relying on the fact that Sega is not enforcing their copyright in this case. Players can enjoy Zero Tolerance on their computer without committing a felony via Console Classix or by buying the original and a Retrode.

This game features 2 system multiplayer via The Technopop 2-Player Network Link Cable. This proprietary cable was offered for free with purchases of the game. With it, 2 Genesis consoles (Megadrives) can be networked through their player 2 ports. Technopop eventually published the schematics so players could make this cable themselves. It is a simple matter of connecting pins to pins, no pins connect to more than one other pin, 2 pins remain unconnected, 1 pin connects to the shielding of the wire. It is impossible to plug the cable in backwards so don't worry about it.
(looking at the port in the console)
___________
1 2 3 4 5/
.6 7 8 9/
1-1
2-2
3-3
4-4
5-NC
6-NC
7-9
8-shield
9-7

alternate diagram:
.1 2 3 4 5
.|6|7|8|9
.| ||||||
.| ||||/
.| | |X|
.| |/|||
.| ||||||
.1 2|3|4|5
..6 7 8 9
Pins 1 to 4 are connected to their duplicate. Pins 7 and 9 are swapped. The 8 pins connect to the shielding of the wire. Pins 5 and 6 are not connected to anything.