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 $17.7K — a different platform, not this one.

ECHELON

ECHELON  is the code name for a top secret military facility located near Isis, a newly discovered planet at the edge of our solar system. ECHELON was established by the International Space Federation (ISF) to protect shipping and mining operations from attack by renegade pirate vessels who have terrorized commerce in the area and are beginning to gain an upper hand. Your orders are to report to ECHELON to be trained to operate the 21st Century's most advanced spacecraft, the C-104 Light Cruiser, code named TOMAHAWK. This patrol vessel has been designed specifically for planetary exploration and is equipped with the latest technology in weapons and scientific equipment. Once you're given the command of a C-104, you'll be stationed in a vast territory known as Patrol Zone 106. While on patrol, you'll discover thousands of objects and structures to explore on the planet's surface. Through the retrieval of "high resolution" artifacts (over 240) that can be transported aboard your spacecraft, you'll search for the solution to a series of mysterious and puzzling events happening in this area. A word of advice, you're not the first pilot to have this assignment. Use caution or it may be your last! Features: Explore the ruins of an ancient civilization! Decipher secret code! Search for missing persons! Discover the secrets of the temple! There are three different ways to play: 1. Scientific - focused on exploration without being attacked, 2. Patrol - exploring the unknown while encountering enemy spacecraft, 3. Military - non-stop action facing hostile enemies