Vault of the Void: A Slay the Spire-like roguelike deckbuilders, but with enough of its own ideas. For example the decksize is fixed at 20 and you gain a booster containing 5 random cards in the beginning. You also can see the encounters and the card rewards before the battle, so you can adjust your deck to each fight if you want.
Gordian Quest: A mix of deckbuilder and rpg where you play a party of up to 3 characters each with their own deck and battle either through the campaign-mode or a Slay the Spire-like roguelike mode. The cards are influenced by attributes and traits that you gain from leveling up and gear.
Dream Engines: Nomad Cities: A survival city-builder where you extract ressources from maps and defend your city against attacks. What differentiates this from other survival city-builders is that your city can fly, and so you can/have to leave once the monster waves get to strong.
Astronarch: A roguelike autobattler where you build a party and autobattle your way through a Slay the Spire-like map to defeat the final boss. Artstyle looks like it was created with the help of ms paint but the gameplay of creating combos between your heroes and items is really fun.
Marvel’s Midnight Suns: Not exactly an unkown game, but I think a lot of people skipped over it because of the Marvel branding. The mix of card-based and tactics combat is the absolute star of the game. And regarding the marvel stuff: Some characters grow on you, especially if you can laugh at how over the top some of the superhero stuff is, and for the rest there is a skip button. Also works well on the steam deck which made it one of my favourite games for when I am travelling.