Black Ice is an indie first-person looter-shooter about hacking in cyberspace, I'm quite fond of it but it's not very well known even though it's a lot of fun. A big new update just rolled out with a bunch of extra content.
Lumencraft is a really interesting game that blends together elements of tower-defense, base-building, mining and a little Deep Rock Galactic in a top-down view. A big new release is out now and it's Steam Deck Verified with Native Linux support.
Another developer attempting to turn the classic Chess into something weird and wonderful. Chess Survivors takes set pieces and moves from Chess, sticks it into a blender and out came a grid based, quick-turn, roguelike.