First Installment Wins: Sort of. The first game is the most well-known, followed by the second one. The third one is quite obscure especially in some western countries, not helped by being released around a time when arcades outside of Japan were going into serious decline.
Polished Port: The PlayStation port, Lethal Enforcers I & II, was an arcade perfect port for both games, and also featured the Sega CD soundtrack. In addition, you could switch to either the standard Arcade Mode or the Street Mode, in which you can choose the starting stage you want for the latter.
Porting Disaster: The Sega ports for both the first and second games had poor graphics and, in the case of the first game, if you couldn't fulfill a certain criteria of accuracy, the game would force you to repeat the same stage for "too many rookie mistakes". The first game on the Genesis lacked health bars for the bosses. The crosshair also moves slow in the Sega ports if you were to play the game with a controller. However, the Sega CD version, despite generally being the same as the Sega Genesis port, makes up for it with its Awesome Music.
Realism-Induced Horror: Part of what made the first two games so controversial was the use of digitized actors (much like Mortal Kombat). Because of this, it looks like you're killing real people instead of just cartoon characters. However, unlike Mortal Kombat, which takes place in a fantasy setting with sorcerers and ninjas, Lethal Enforcers depicts the frighteningly realistic scenario of a police shooting (or even a mass shooting). Unfortunately, it's a scenario that might hit too close to home for some people.
