Play Zero Tolerance Online
You blast through a derelict space station with a squad of five soldiers, switching between them as aliens swarm from every dark corner—lose one, and you’re down their weapon for good. The meltdown timer’s ticking, and you can’t leave until every last alien’s dead.

Zero Tolerance came out on the Sega Genesis in 1994, developed by Technopop. It was one of those games that tried to push the 16-bit hardware into first-person territory, a space not many console games explored with much depth at the time. You got the sense they were really trying to build something ambitious for the system.
You control a team of five soldiers, each with their own specialty and weapon, and you can switch between them on the fly as you fight through a spaceship overrun by aliens. The main goal is to purge the infestation and escape before the station self-destructs. Key mechanics include managing your squad's health and ammo, finding keycards to unlock new areas, and dealing with the permanent loss of any soldier who falls in combat. The pacing is relentless, and the difficulty is unforgiving; every corner could be your last. It feels like a tense, claustrophobic race for survival where every decision carries weight.

Download Zero Tolerance ROM
You can download this ROM to play Zero Tolerance offline using an Sega Genesis (Mega Drive) emulator (Top Emulators).
*This ROM is provided for backup and educational purposes only.