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 $9.1K — a different platform, not this one.

Monster Run: Downfall of the Empire

You embody a giant fire-breathing monster cat. To protect your forest ravaged by a greedy human empire, you've decided to personally destroy the empire, together with all of its soldiers, castles, kings and things.     Endure the challenges and unlock a large array of new supernatural abilities. With 100 upgrades, you can harness 11 unique attacks, ranging from panic-inducing roars to shooting electricity from your paws - or even summoning a rain of blades to pour down your enemies.       Most of your enemies will be tiny, yet evil. They will be commanded by various minibosses, aided by powerful wizards, and protected by large fortresses. The formidable armies of your enemies feature more than 66 different types of enemy units.   Features: Fight as a giant monster against massive human armies, minibosses, and wizards. 72 different enemy unit types. Diverse opponents that use a variety of tactics & stances, not simply rushing you. Humans are subject to fear & will panic if their fellow soldiers get massacred. More than 100 upgrades, including more than 10 new unique abilities & attacks. Single-player campaign with 22 missions Evolving map (each time player starts a new run, some missions will be switched with new, alternative missions). It's a roguelite/survival experience, expect your fights to be challenging and deadly, with an optional permadeath mode. Destructible environments - human-made constructions (including furniture, towers, castles, etc) are fully destructible.