This might be a slightly unusual attempt at a prompt, but might draw some appealing unusual options.
The way it goes: Suggest games, ideally the kind that you believe would have relatively broad appeal. Don’t feel bad about downvotes, but do downvote any game that’s suggested if you have heard of it before (Perhaps, give some special treatment if it was literally your game of the year). This rule is meant to encourage people to post the indie darlings that took some unusual attention and discovery to be aware of and appreciate.
If possible, link to the Steam pages for the games in question, so that anyone interested can quickly take a look at screenshots and reviews. And, as a general tip, anything with over 1000 steam reviews probably doesn’t belong here. While I’d recommend that you only suggest one game per post, at the very most limit it to three.
If I am incorrect about downvotes being inconsequential account-wide, say so and it might be possible to work out a different system.
Taiji (906 reviews)
Nonlinear discovery-based puzzles
If you liked the puzzle design of The Witness, you’ll enjoy Taiji as more of that but with scenic pixel art.
Instead of a linear sequence of tutorials and puzzles, Taiji is open-ended. You can wander wherever you want, solve the puzzles you stumble upon, and ultimately discover this place’s secrets. Sometimes you find a puzzle that you don’t understand, so you’ll just have to leave it for later, when you’ve learned more puzzle mechanics. It’s like a metroidvania but gated by knowledge instead of abilities.
All the puzzles are built on grids of tiles that you can turn on or off. There are no tutorials; you have to figure out the puzzle mechanics on your own, hinted by environmental details.
Taiji was waaaaay harder than the Witness for me personally, but great choice. The vibe and music and what not is super chill also
definitely scratches the same itch more than games like the talos principle. there’s like one group it completely fails to properly tutorialize imo, and one that kind of falls short (although having played the witness will make your assumptions more accurate i think). other than that it’s a brilliant game.