Nightmare of Druaga is a hack-and-slash dungeon crawler, with lots of action and little pretension. In the role of an intrepid warrior, players advance by defeating various monsters and improving their characteristics with the loot and experience they gain, then moving on to face more powerful opponents. The game is set in a familiar fantasy environment, home to numerous underground caverns and dungeons that are teeming with nasty baddies. A multiple fighting styles and a variety of weapon choices are available. The adventure is saved at the end of each level, but players cannot save at will or keep multiple save files, adding to the challenge.