Space Quest 4: Roger Wilco and the Time Rippers

The game cost over US$1,000,000 to produce and sold more than its three predecessors combined.

An easter egg in this game is accessed by entering the code in the time capsule as the top row of buttons in order from left to right. This transports Roger to the volcanic planet of Ortega from Space Quest III. Unfortunately, this time Roger is not wearing any thermal underwear, so if he steps out of the capsule, he melts. Much like SQI's Ulence Flats, Ortega (what little of it is seen) appears in SQIV using the graphical style of the earlier game.

Another easter egg near the end plays on the desktop format of Macintosh computers, featuring a toilet in place of a waste basket. Certain icons must be "flushed" down the toilet; however, if the icon "SQIV" is deleted in this way, the game exits. An additional icon, referring to King's Quest, brings up a message when "flushed" indicating that a massive amount of data has been deleted, referring obliquely to the large number of 3.5-inch disks early versions in that series required on some systems.

Ms. Astro Chicken: Flight of the Pullet is a computer game embedded within Space Quest IV. Ms. Astro Chicken appears within the context of the game in the form of an arcade game. It is a sequel of sorts to Astro Chicken, an arcade game that appeared in Space Quest III: The Pirates of Pestulon.