Space Quest IV - Roger Wilco and the Time Rippers © 1991 Sierra On-Line, Inc.
Discover the most burlesque and satirical world of space ever to come to the computer screen! Learn how to survive with your favorite hero and stand your ground in the face of an evil assault force from the Cosmos. A force which is determined to make this adventure the last one in the series... The future of the next Space Quest lies in your hands!
Deadly crosstime assassins are out to put an end to Roger and all this Space Quest nonsense once and for all.
A space opera that will leave you laughing. Hand painted, futuristic color graphics, realistic animation & scrolling screen.

Released on March 4, 1991 in the USA.
It was one of the first games to use motion capture animation. The game cost over US$1,000,000 to produce and sold more than its three predecessors combined.
The games at the software store are all parodies of other games. Here's a list of the parodied games:
Boom by Morrie Brianarty is a parody of Loom by Brian Moriarty.
It came for Dessert is a parody of It came from the Desert.
Defender of the Crown Rib Roast is a parody of Defender of the Crown.
Where in the World is Hymie Lipshitz (and who really cares) is a parody on Where in the World is Carmen Santiego.
Sim Sim from MaxThis is a parody on the Sim games from Maxis.
Cluck Egger lets you design a chicken and fly it over barnyard scenery. This is a parody on the flight simulator Chuck Yeager.
References:
1) Cedric, the owl from King's Quest V has an appearance in the Ms. Astro Chicken game at the Galaxy Galleria's Arcade.
2) In the Control room of the SuperComputer, two programs immediately come to mind: King's Quest and Leisure Suit Larry.
3) When you're in the pterodactyl's nest on Estros, you can see something streak across the sky. This is in fact King Graham being carried by a condor (from King's Quest).
4) The Quest for Glory theme music is occasionally played in the Software Store at the Galaxy Galleria, made out to sound like a PC internal speaker.
5) At the Big and Tall store at the Galaxy Galleria, you can occasionally spot a guy rummaging around, occasionally pulling out a pair of red shorts. This is Bob Andrews, former Sierra OnLine programmer.
6) Luke Skywalker's little red speeder is disguised as the crashed hovercraft on the Xenon streets.
7) The trash can in the Galleria's Arcade is one of the agents from Get Smart.
8) During your visit to Ulence Flats, the Blues Brothers appear on stage at the bar, since they also appear in Space Quest 1.
9) The robots in the SuperComputer are the Imperial ProBots from the Star Wars movies.
10) When you first visit the Software Store at the Galaxy Galleria, the bouncer will tell you that the Two Geeks From Andromeda are in there, signing copies of their latest release.
Aside from the narrator Gary Owens, all voices in the game are done by Sierra employees. Guy from Andromeda Scott Murphy even does the voice of Sludge Vohaul.