Cozy Grove looks interesting!
I'd recommend
Sands of Salzaar, as it's 40% off (not sure if it's the best sale yet). A weird fever-dream mix of Mount and Blade, some Kenshi and other things, but adds all sorts of magic and crazy skills that make some battles hilarious. You can really feel OP at certain points, either due to your army or your own OP character.
Other stuff I had fun with recently (or not so recently):
Software Inc. is only 25% off, but I've spent so much time in this game and always felt it was too low-priced anyway. It's been in "alpha" since forever, but I've never really felt it was an Alpha.
X4 Foundations is at 50% off with DLCs with some discounts. A new DLC will be out on Q1 or Q2 next year, which should (hopefully) make pirates more interesting and active. Sort of a chance to get in now and build up before the DLC hits, if you're into that sort of thing.
Astroneer is well-known at this point and is even better with friends. 50% off.
AIM 2 Clan Wars is nearly free. It's an old game that I go back to every couple of years. Very niche.
Weird enough, I'm more excited for updates/DLCs/mods of current games than new games themselves nowadays, and I don't have much patience for getting into new things..unless they perfectly hit my preferences. I think I'm getting old.