QUByte Classics: Zero Tolerance Collection by Piko combines Zero Tolerance, Zero Tolerance Underground and the unlockable prototype of Beyond Zero Tolerance to an ultimate compilation of 16-bit shooter action! First released in 1994 for Sega Mega Drive/Sega Genesis, Zero Tolerance sets players in a distant future where the universe has to face an alien invasion. That’s when the Zero Tolerance team is being called to protect mankind from the enemy!