Some Assembly Required

Released 1998

Originally developed for Windows and Macintosh. Later versions were made for Linux, Steam, and iOS.
The nasty LeRoach of S.M.E.L.L.Y. has built a gigantic Dogbot which is disguised as part of the World's Fair. As visitors enter, they unknowingly wind part of the gears and when 1 million have entered, the robot will begin a destructive tear. Spy Fox must stop it from happening.