Space Quest IV: Roger Wilco and the Time Rippers, is a point and click adventure game released in 1991 by Sierra On-Line. The game was released for Amiga, Macintosh and PC (DOS).
In the fourth part of the game, Roger Wilco will travel in time - both into the future and the past. Sludge Vohaul (from the XII part of Space Quest), infomorph has been reborn and travels through time to at any cost hunt our hero and kill him. Roger, will visit various parts of the game such as Space Quest X and Space Quest I. By visiting the first part of the game, the graphics returns to the original and meets a monochrome motorcycle gang that thinks that the artwork in 256 colors is pretentious.