List slightly filtered to exclude some games that were already mentioned.

https://store.steampowered.com/app/3126530/Jupiter_Hell_Classic/
It's the original DoomRL with the Doom branding stripped out so they don't get sued, plus some unspecified updates.

https://store.steampowered.com/app/2559370/The_Scramble_Vice/
That tomboy game you keep seeing threads about. I'm not the guy making the threads but I do like the look of the game (and the tomboy).

https://store.steampowered.com/app/2513200/Mystic_Land_The_Search_for_Maphaldo/
A nice-looking Wizardry 7 clone.

https://store.steampowered.com/app/3105440/Heroes_of_Might_and_Magic_Olden_Era/
Ubisoft finally realized they can't make a better game than HoMM3 so they hired a team of slavs to develop a spiritual successor to it.

https://store.steampowered.com/app/903930/Brigador_Killers/
Sequel to Brigador. If you haven't played Brigador yet, go play it.

https://store.steampowered.com/app/2446990/Knight_Foretold/
Top-down RPG with an interesting combat system.

https://store.steampowered.com/app/1561740/Kriegsfront_Tactics/
Mech tactics game, reminds me of Front Mission.

https://store.steampowered.com/app/2610770/Dust_Front_RTS/
Slav-made grimdark RTS game.

https://store.steampowered.com/app/2695810/Sunset_Devils/
Arcadey shooter with a side of gun autism. It has a free demo.

https://store.steampowered.com/app/2134720/Stormbinders/
The other HoMM3 spiritual successor, this one published by Slitherine.