Indie developer Unfrozen’s Iratus: Lord of the Dead has came in early accessibility type on Steam. The name definitely owes much to other hardcore roguelike dungeon-crawling fare which has come before it, like Darkest Dungeon.
Think of it like Darkest Dungeon with one catch – you play the bad man. Build up a army as you plod through dungeons, make them go mad, and stress out your human adversaries, take on big bosses, and learn spells. While it’s a roguelike through and death is often swift and unforgiving, as you perform you unlock undead components to summon as a permanent development aspect from playthrough into playthrough.