No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. Reviews and prices only.

Kenshi

Kenshi is an open world, squad based sandbox RPG set in a brutal sword-punk wasteland. Gameplay is open-ended rather than a linear story, so you can play as a settler, a trader, a thief, a rebel, a warlord, an adventurer, a farmer, a slave... or just food for the cannibals. But first things first, you need to survive. Train your men up from puny victims to master warriors, carry your wounded squad mates to safety and get them all home alive. You are not the chosen one, you’re not great and powerful, you don’t have more ‘hitpoints’ than everyone else and you are not special. Unless you work for it. Customise a solo character or a whole squad and train them from puny victims to master warriors Survive in an unrelenting world of slavers, cannibals, wild beasts and famine. Nowhere is safe. Build your own fortress, research technologies, craft your own gear and wage war with other factions Explore and scavenge the uncharted lands of one of the largest single player open world maps to date Absolutely no level-scaling. The world does not level up along with you and the game won't hold your hand.