The game was created using Sierra's AGI engine and featured a pseudo-3D environment, allowing the character to move in front of and behind background objects. The primary means of input in "Space Quest", as in many other AGI games, was through the use of a text parser for entering commands and use of the keypad or arrow keys for moving Roger Wilco around the screen. The Amiga, Apple IIGS, Atari ST and Mac versions of the game offered basic mouse support for movement as well. The game had a 160×200 resolution displaying 16 colors. Sound cards were not available in 1986, so sound was played through the PC's internal speaker; owners of Tandy 1000, PCjr and Amiga computers would hear a three-voice soundtrack, while Apple IIGS owners were treated to a fifteen-voice soundtrack with notably richer sound.