No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $73.6K — a different platform, not this one.

The Chaos Engine

Sometime during the last century, an experimenter with time, space, and early computers created a bizarre machine. The inventor's name was Baron Fortesque. The machine was... THE CHAOS ENGINE. Although primitive, the machine became incredibly powerful and went crazy, turning humans into razor-toothed, armor-plated killing machines. This gripping, action-packed adventure takes you through four distinctive graphic worlds and 16 challenging levels – alone or with a friend! Each level is loaded with fiendish traps, secret passages, and puzzles. Which means to survive this maniacal gauntlet filled with hordes of different monsters, you'll need to use not only arsenal of hands-on firepower but also your mind! And if you can survive all that, you still have to take on the Chaos Engine itself. Co-op notice (Mac): Co-op on Mac is still being developed and might not work properly. div.game_top { height:312px; } ul.labels > .lang_bubble { margin-bottom: 20px;} ul.details > .lang_details { height: 30px; line-height:16px; max-width:360px; padding-top:1px;} Battle through four unique worlds in single player or local co-op modes. Play in 'Enhanced mode' or 'Classic mode' with its original graphics and controls for the true Amiga experience. Gamepad support with optional 16-directional movement. Relive the classic 90's Richard Joseph soundtrack.