DROD: Gunthro and the Epic Blunder

Here's an excerpt from DROD: Gunthro and the Epic Blunder's Steam description:

Swordplay and puzzles combine in this thinking man's dungeon crawl. It's simple to learn, with just a handful of commands to master. This game's rogue-like exterior belies clever puzzle design and unique play mechanics that provide amazing depth. Each room is a hand-crafted puzzle that you solve by clearing out all the monsters with your Really Big Sword without letting any reach and kill you.

Monster types each have their own AI, with deterministic movement patterns. Puzzle elements and terrain types help and hinder you in solving each puzzle. You start by learning basic mechanics and fighting techniques, and then the difficulty steadily ramps up as each room you face presents a fresh challenge with a logical solution.

This game is the entry-point title in the ongoing DROD franchise. "Gunthro" is designed as an beginner-level offering to the DROD world, with both new players and veterans in mind. The level layout is has multiple hub areas to explore as you progress. The game starts easy, has a smooth learning curve and an integrated online hints system.

The story: In this game, Beethro Budkin recounts an epic tale of adventure to his precocious nephews about his grandfather, Gunthro Budkin, and his exploits in the dangerous nation of Rasarus. Gunthro is a third-generation smitemaster and a rather ugly man. Smitemasters are hard-bitten, muscled veteran dungeon exterminators that slay hideous beasties in dark places for a living. You know Gunthro will get the job done, and you'll happily pay him to clear your basement of giant man-eating dungeon roaches.