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 $5.7K — a different platform, not this one.

Water Margin - The Tale of Clouds and Wind

A light shines from the depths of the earth; heavenly spirits and earthly fiends arise. The blood of the people runs cold, and heroes tremble in fear. Vengeful forces seek to destroy the heroic outlaws of Mount Liang. A tale of immortal deeds now begins, let all listen and take heed. Water Margin - Tale of Clouds and Wind for Genesis is a beat’em up game with lots of action and hours of gameplay. Choose between 3 outlaw heroes and help them battle through oppressing armies of evil men. Water Margin features several different alternate endings depending the character and the difficulty you play the game through. It features different power ups and colorful 16 bit graphics. You can play two players simultaneously or pass through the game solo. This game was original release in Hong Kong during the mid 90s. It has now been fully translated for English speaking players.