Horripilant is a thoroughly unusual dungeon crawler that will make you feel quite uneasy blending in some elements from idler, puzzle and autobattler games.
Gates of Skeldal (Czech: Brány Skeldalu) originally released in 1998 and recently it gained a Native Linux version along with a source code re-release.
With a demo that's just been released and a full release date announced, Becoming Saint looks like a clever blending of genres. I actually love how this looks.