a sequel called "beyond zero tolerance" (or "zero tolerance 2") was in development by technopop for the sega mega drive/genesis, but it was cancelled. a letter-writing campaign for accolade to release the game was started, with no success. the roms of the game and its sequel were offered by the owner for free download later. the story of "beyond zero tolerance" involves the player character traveling to the alien homeworld to eradicate all life there.