Been reading too much dungeon core, need game rec's.

Howdy howdy! Ok, so I used to play a game back in the day, dungeon something or other (DOS) can't quite remember the name. It was a kind of tower defense where you play as the dungeon core.

Looking for something like it but more modern, and if it's not a dungeon specifically that's fine. For example, I was really tempted by "Evil Genius 2" it looked like it hit some of the itches I am looking to scratch (metaphorically of course) but I was turned off when I saw it utilizes Denuvo.

Any recommendations, or remember the name of the DOS title I am thinking of? Pretty sure it was popular enough to be on GoG but I just canna remember the name for the life of me. Think dungeon something...