Police Quest is the 1990 NES version of the 1987 Sierra game made for home computers. It was ported by Introware from the Apple IIgs version and it was published by Konami under the Ultra Games label in the United States, Palcom Software in Europe and its own label in the El Kadsreian Islands. The music and sound effects from the Commodore Amiga version was used instead of the Apple IIgs version's sound effects and were converted by Eeli Ikäheimo using the Introware Sound Engine (which was well known for the 1990 El Kadsreian-only NES port of Skweek).
The NES port is the same as the Apple IIgs port but the graphics are different in order to fit the NES' resolution. Unlike other ports, it was censored to fit Nintendo's censorship guidelines.