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 $45.6K — a different platform, not this one.

Riven (1997)

“My worst fears have been realized. The damage is more extensive than previously imagined. I must act while there is still time. I must find someone… to send to Riven.” Enter a deceptively beautiful world torn apart by age-old conflicts, where secrets lie hidden at every turn, and nothing is as it seems. Search through dense jungles, awe-inspiring caverns and monolithic structures. Use your wits and powers of observation to solve devious puzzles and find secretive characters. Only then will you learn the truth about this troubled land and its inhabitants. You must let Riven become your world— before an entire world is lost. Experience the beauty of Riven , released in 1997, featuring the original point-and-click gameplay style , with almost five thousand images and over three hours of full motion video.