So many.

Hollow Knight, Celeste, Outer Wilds, Subnautica, Stardew Valley, Slay the Spire and Zachtronics games likely need no introduction. Then there’s also…

Bug Fables. Incredibly satisfying Paper Mario-like which has thrived into its own thing.

Baba is You/Environmental Station Alpha, hempuli games. The former you’ve likely heard of, a logic Sokobon with truly mindbending puzzles deeper within (and a level editor!! god, I could gush about level editors for hours). ESA is an older hempuli metroidvania. If you’re a fan of that genre, it’s among the best.

Caves of Qud – the best true roguelike IMO. It has so much flavor.

Slime Rancher [2], my beloved serotonin game.

Against the Storm, really well polished citybuilder that emphasizes the first few hours of citybuilding. It’s a bit hard to explain here, but I’d suggest looking into it if you’re a fan!

Symphony of War: The Nephilim Saga, my personal favorite tactical RPG.

I could go on but I gotta draw the line somewhere…

Maybe not underrated, but Darkwood blew my mind.

I’m not sure Siralim Ultimate qualifies as “underrated”, but it’s the kind of game where if the idea resonates with you it’ll keep you happily busy forever. It’s often compared to a Pokemon game, but I think it’s better described as Pokemon meets a dungeon blobber.

At its core, you build a group of six creatures and go into a procedural dungeon where you will fight other groups of similar creatures, picking options like fighting and casting spells. The creatures each have special traits which change game rules for them, and your job is to take advantage of this so that you win these fights. Your character also has perks which act as additional modifiers, and fusing creatures and slapping artifacts on them means you can apply even more changes to how everything works.

The interesting part emerges from the fact that these traits are generally not modifiers like +3.5% damage on Tuesdays; they are instead drastic and game-warping options like “If this creature successfully attacks, there’s a 50% chance that a dead creature on its team is resurrected.” That by itself is kind of hugely impactful… and it’s also kind of basic and boring for Siralim. Now let’s fuse it with a monster that immediately gets a free attack if the enemy attacks any other monster on your team, now we’re starting to cook.

Your actual goal isn’t to play fair, it is to fold, spindle, and mutilate the game’s mechanics to allow your team to win in increasingly unfair and ridiculous fights. It’s also pretty good at letting you control your level of challenge, incidentally, but you are at some point going to have to win against enemies with their own completely bonkers tricks. If you enjoy figuring out how to warp complicated rules to your benefit and stack absurdity atop absurdity, this game is calling for you. It’s absolutely got indie jank, by the way - the graphics aren’t amazing, the game sometimes grinds along very slowly processing all the silliness, and while it has lots of reference material ingame there’s still just way too much information to take in.