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 $126.1K — a different platform, not this one.

MDK 2

Kurt Hectic in his snazzy suit with ribbon chute is back to save the universe. This time he is teamed with the genius Dr. Hawkins and the 6-legged gun-toting robotic dog, Max. Together they must out-sneak, out-blast and out-think their enemies as they attempt to reclaim the Earth from a vile alien menace. All three characters - Kurt, Doctor Hawkins and Max are playable, each has his own levels, powers and items and a completely different gameplay focus. Kurt is about stealth and sniping, the Doctor has a few direct attacks but also has the ability to create items and effects out of simple household objects, while Max is a cigar smoking, quad gun toting demolition squad of a dog. Hungry for more? Check out the MDK 2 editorial Even more action and humor than in the original! You can now play as the two other characters, each with a different gameplay style and focus Absolutely awesome, narrated, comic book-style introductions