>>713922792 Stray Cat Crossing, and Hello Charlotte - these ones are mine actually, especially the former I think was in the limelight from let's play channels when it came out but has fallen out, RPG games but I think they have lots of charm even against some of the other big names
Deadly Premonition
Baba is You is the most abstract puzzle game I can think of. It also has the hilarious side effect of making most people mumble in broken english while playing it.
Color Assembler -- Combine colors to get other colors, in a mathy way.
Edge -- flippyfloppy to get a cube to the end
Globesweeper -- Play minesweeper on a globe or cube, with square, hex, or triangle grids.
Mini Metro and Mini Motorways -- Direct traffic flow.
Sokobond -- try to bond with other chemicals in the right order and direction.
Wave Mechanics -- You know those puzzles where when you click one thing, it and all neighboring tiles swap to the opposite color? Imagine if that was shaped more like a crossword.
Waveform -- sync up a wiggly line to the wiggly line on the screen.
Zenbound -- Tie up wooden blocks as evenly as possible with as little string as possible.
Yon Paradox isn't abstract, and I'm not sure if it qualifies as good exactly in terms of playability, but it's a timeloop game where you're trying to get to places.
Greyfox is an interesting one. A lot of it isn't horror, but there's this one part...
The Last Word -- has a very unique conversation-based combat mechanic and a pleasant story.
Omori -- Emotionally Devastating Horror.
Why Am I Dead At Sea -- a classic!
Duskers -- Scavenge ships for parts in the post-apocalyptic space future. Don't let anything bad aboard your ship.
Fishing Vacation -- Gameboy aesthetic, fishing gameplay, a smattering of story around the edges if you look around.