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.
For my it's Bone's Café.
Imagine overcooked but where you kill and use your customers as ingredients and can raise skeletons from the dead to automate as your chefs and servers. It's overall a very well put together game, especially for one with 240 reviews (total)
https://store.steampowered.com/app/1739070/Bones_Cafe/
I haven't played it couch co-op but the solo play has been really enjoyable
Heretics Fork is a really good deckbuilding tower defense game https://store.steampowered.com/app/2181610/Heretics_Fork/
The hell theme is cool, the cards are interesting as well as the characters you can play and overall just a really high quality game that's underappreciated.