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Zero Tolerance (Genesis)

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Developed by
Critic Score
100 point score based on reviews from various critics.
User Score
5 point score based on user ratings.
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The space station Europe-1 has been overrun by aliens. During one of the fights the nuclear cooling system has been damaged, resulting in a meltdown within hours. Your mission, as a team of five of the toughest persons in the Corps, is to infiltrate and gain control of Europe-1. You must sweep the entire station clean of aliens.

Zero Tolerance is a first-person shooter. It is required that you kill every single alien on each of the levels (hence the name). The five members of your team, who have different skills, start out with different weapons, and are your five chances of seeing this through.


Zero Tolerance Genesis Now, I have trouble
Zero Tolerance Genesis Mom, I want a Sega Saturn, not a Genesis!
Zero Tolerance Genesis Dead...
Zero Tolerance Genesis Armored enemy

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User Reviews

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Critic Reviews

Sega Force Feb 22, 1995 89 out of 100 89
Mean Machines Oct, 1994 86 out of 100 86
Mega Fun Oct, 1994 82 out of 100 82
Shin Force Mar 11, 2000 8.1 out of 10 81
Just Games Retro Mar 18, 2007 4 Stars4 Stars4 Stars4 Stars4 Stars 80
Electronic Gaming Monthly (EGM) Sep, 1994 30 out of 40 75
Megablast Sep, 1994 70 out of 100 70
Game Players Oct, 1994 65 out of 100 65
Video Games & Computer Entertainment Dec, 1994 6 out of 10 60 Sep 06, 2007 5 out of 10 50


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European version

In the human version, all human enemies were replaced with aliens and blood is green instead of red.

German index

On March 31, 1995, Zero Tolerance was put on the infamous German index by the BPjS. For more information about what this means and to see a list of games sharing the same fate, take a look here: BPjS/BPjM indexed games.


Aside from being one of the rare console FPS, Zero Tolerance even managed to include a PC-style multiplayer mode. Players would send a coupon away to the developers for a special link cable that would connect two Genesis units together through the second controller port. Players could then co-op through the single player levels. No other multiplayer modes were included (deathmatch, specific multiplayer levels) and forcing two televisions, two consoles, and two copies of the game was a hefty requirement. Still, a unique addition.

Public domain

'Zero Tolerance' and its unfinished unreleased sequel 'Beyond Zero Tolerance' have become part of the public domain. The developer Zyrinx has done this under the condition that they will not be modified, and only distributed in their original form (the ROM file).

This means it is legal to download, use and keep the ROMs.


The five playable characters are all named after members of the development team.

Information also contributed by BurningStickMan and Xoleras
re_fold (310) added Zero Tolerance (Genesis) on Aug 23, 2003