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 $355.3K — a different platform, not this one.

The Ball

As a swashbuckling archaeologist working on the slopes of a dormant volcano somewhere in Mexico, you get stuck in a cavern and accidentally reveal ancient ruins that have been hidden from outsiders for centuries. There you discover a mysterious artifact, a gold and iron-shelled Ball. Venturing deeper into the underground, you encounter not just puzzles and traps, but also strange, malicious creatures that are guarding the secrets buried within the volcano. You’ll need to uncover the secrets of the Ball and learn to control it in order to survive and escape the underworld with some of mankind’s greatest secrets. The Ball is a first person action-adventure game that will have you solve puzzles while bowling against a bewildering barrage of beasts. It features a full single-player experience built on Epic’s Unreal™ Engine 3 technology. Eight huge levels to explore, and a bonus Survival game mode with 4 additional levels. Original, yet intuitive interface. Beautiful underworld constructed in Epic’s Unreal™ Engine 3.