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 $116.3K — a different platform, not this one.

Descent: FreeSpace – The Great War

Includes the original Freespace and the Silent Threat mission pack They arrived by the thousands, suddenly and without warning. The heartless Shivans emerged through subspace near Earth, harboring technology light years ahead of anything seen before. They made no attempt to communicate. They did not respond to your heralds. They simply attacked and destroyed everything in their path. As a pilot for the Galactic Terran Alliance (GTA) you are no stranger to war. But when racing through space to engage your new enemy for the first time, you sense something different. Suddenly, darkness blankets your craft. Your stomach sinks as your eyes pan across the Shivan flagship's massive body. Then it begins. Swarms of fighters pour from the belly of the flagship and scream towards you. You are about to discover everything you thought you knew about space combat just changed. This is the beginning of The Great War. Includes the original Freespace and the Silent Threat mission pack Multiple beautiful space fighters and bombers with customizable loadouts A gripping story full of epic space battles and plot twists