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 $54.3K — a different platform, not this one.

SHOCK TROOPERS

“SHOCK TROOPERS” , the fan favorite 2D top-down view action shooting game released exclusively on NEOGEO MVS in 1997, returns to the battlefield on GOG! Progress through the battlefield, choosing the best routes and strategy! ARCADE - Choose a character and go on your mission solo in “Lonely Wolf” mode, or form a team of three soldiers from the eight mercenary characters available, and try to rescue Dr. George and his granddaughter who have been kidnapped. The route you choose at the beginning will affect the progress of the game, allowing you to enjoy an original gameplay experience time after time. MULTIPLAYER - Clear missions with a brother-in-arms far away via the Online Co-Op Play feature. Engage with a fellow countryman or foreign ally, and try to put an end to the evil plans of the terrorist group called the “Bloody Scorpions”! LEADERBOARDS - Check your current rank & score in “SHOCK TROOPERS” at any time, as well as those of your friends and other top troopers! SETTINGS - Configure your language, video and language display, and adjust sound volume settings to your preference for the most pleasant “SHOCK TROOPERS” experience ever.