Ofcourse Zero Tolerance is one of best Sega Megadrive/Genesis FPS game. But this port/remake/re-release is quite not the best. Minuses: The game process is in the middle square. There is not even stretching to entire screen feauture. 2 player mode indeed there but not functional. Same frames per second problems problems as in original release. Enjoy your game.
The game itself is a great remake indeed, though would recommend to play first one on GL emulation but need to mention that only steam version has latest beta patch which allows to mod game entirely. Several nice mods improved gameplay and not only all by strong community, and these all avaliable only on steam version.