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 $788.9K — a different platform, not this one.

Withering Rooms

Withering Rooms is a challenging 2.5D horror RPG set in a procedurally generated Victorian mansion that changes each night.    Explore Mostyn House to gather weapons, distractions, magical artifacts, keys, and crafting materials.  Take on a huge cast of monsters and bosses - overgrown undead, invisible ghosts, devious witches, axe wielding madmen, and many more.  Discover secret passageways, dusty attics filled with treasure, and even the ever-changing Byzantine Labyrinth that lies beneath Mostyn House.  Take the sting out of death by performing rituals to preserve items from night to night or permanently level up.  Meet a cast of strange friends, merchants, liars, and witches each with their own agenda.  Cast a wide variety of spells - create hex traps on closet doors, enchant suits of armor to assist you, or create a decoy mimic of yourself.  Greater dangers - and greater treasures - await you in the hedge mazes, tombs, caves, churches, and ruins beyond the Mostyn House grounds.