DROD (Deadly Rooms of Death)

It was a shareware game that came out in the 90s that's half puzzle/half dungeon crawler where you are Beethro Budkin, Exterminator for Hire, and King Dungan has hired you to clean out the dungeon of roaches and other things so that the prisoners can have a proper torture. Since the shareware days of yore, DROD has gone free after being purchased by Caravel games. You can play the original game for free and updated to add new graphics, music and checkpoints while the series has continued on in the shadows. It might be on Steam these days and I highly recommend it if you want a sort of chess dungeon crawler type game.