Undertale and Deltarune are easy recs, emotional and fun to dig into the lore and details. Deltarune in particular is an ongoing series, so there's lots of speculation and theory crafting if that's your thing. Amazing soundtrack as well. Undertale should be played first, though. Deltarune isn't necessarily a sequel, but Undertale gives some context to certain things. Both are best played blind.

Inscryption is a really fun deck builder with a very intriguing story and some surprising twists and turns. Even if you're not much into deck builders, the game is structured such that it's pretty much impossible not to get a winning deck over repeated runs. The atmosphere is also top notch.

Ghost Trick: Phantom Detective isn't on steam, but it's definitely worth a buy on one of its supported systems if you have them. Great puzzle game with a lot of humor and mystery. Not quite as emotional, but very strong characters and an ongoing mystery that kept me invested.

Oxenfree is a really intriguing mystery game with some horror elements and a great soundtrack (I originally checked it out after hearing Beacon Beach and loving it). Overall the game really scratched the itch of that feeling of reading horror stories before bed.

There's also a free, short Silent Hill game on PS5 called The Short Message. It has mixed reviews, but my friends and I found it surprisingly engaging. At first it seems pretty on the nose with its message, but things get a little deeper as you go on. Aside from some cartoonishly evil characters and a somewhat frustrating final sequence, it's worth a look.