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 $39.4K — a different platform, not this one.

Gun Metal

Gun Metal is a futuristic action-packed experience where you take control of the fully transformable prototype combat vehicle known as the Havoc Suit. The Havoc Suit, a prototype combat vehicle, remains the only hope to save civilization from a tireless enemy. Standing 10 meters tall, with an arsenal of devastating weaponry and the ability to transform instantly into an agile jet, only this formidable battle machine has the potential to halt the invaders! Use the Havoc Suit to battle-ground-based enemies, or transform in the blink of an eye into an agile jet and take on aircraft in high-speed dogfights. Either way, get ready for mind-blowing action and out-of-this world graphics. Key Features: Fight hordes of enemies through 14 incredible missions Scorch the earth, crush rocks under foot, fell trees Tear chunks out of towering buildings and raze entire settlements to the ground! Tool-up with an extensive armoury of devastating weaponry.