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 $58.2K — a different platform, not this one.

Obscuritas

When Sarah inherits her great-uncle's old country home, she has no idea about the dark secret she has stumbled upon and into what obscure world it will take her to. Help Sarah solve the mystery and escape the malicious clutches of the old mansion. Fear is a constant companion on your journey. No matter the dark shadows lurking behind every corner, creeping beasts or demons from another dimension: You have to face your greatest fears to defeat the darkness. Creeping shadows, huge spiders or terrifying monsters that are coming for you: Experience your personal nightmare through the game's “fear recognition mechanic” While fighting your way through this nightmare you'll have to solve various riddles to get to the root of this evil and defeat it Face your Fears in 3 different chapters with a total of 29 sequences Experience thrilling graphics set in an atmospheric environment which will turn your blood cold