So I've recently gotten back into reading the Kill 6 Billion Demons's companion rpg Broken Worlds. I really like how the mechanics allow the pcs to confidently solve and start problems. Plenty of ways for the GM to make a problem out of something, so many incentives for characters to play smart. It's definitely a brain-on game, but I really like those kind of games.
It's on patreon, I thought the free version was open to download, but futher research points to it being a patreon exclusive.