Recommendation engine: Downvote any game you've heard of before
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.
Our Adventuring Guild doesn't look like much on its cover but it scratches all the management sim and tactics RPG urges that I enjoy, while also having some surprisingly cute writing (while still mainlining the classic fantasy RPG themes)
Picked this one up on a whim from a summer sale discovery queue and it's been such a delightful surprise! I'll second scratching the RPG and tactics itch, just wish I had more free time in my life right now because the game is turn based crack for me.
Bonus points for being a Unity game which makes it technically moddable (even if the developer has no plans of adding official support for it).
Throwing in Tactical Breach Wizards, because it just came out and has very similar trun based tactics vibes, but with more sarcastic/ absurd humor that you'd expect from Heat Signature or Gun Point (on account of being from the same developer).