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 $33K — a different platform, not this one.

AquaNox 2: Revelation

In 2666 a young freighter pilot called William Drake sets out to search for the heritage of a mythical ancestor. He is looking for adventure - and finds greed, ruthlessness, merciless hatred… and also unexpected help. But very soon he has to realize that he is not the only one hunting for his ancestor's legendary treasure. You will become a member of a group of eight mercenaries crossing the oceans. The crew is crammed together in the claustrophobic atmosphere of a freighter: Always on the lookout for loot and the legendary treasure… and always afraid they themselves might become the victims of their unknown enemies. Unique underwater environments Upgradable submarines with a variety of parts and weapons The greatest graphics of its time with few signs of aging even today