Doomsday Diner is a culinary simulator set in a post-apocalyptic world, where the only remaining diner is forced to serve survivors and protect its profits. The atmosphere of a dilapidated diner is enhanced by greasy surfaces, scuffed equipment, and 1950s tunes playing on the jukebox. Gameplay revolves around following recipes: grilling sausages, adding sauces, and quickly brewing coffee. Guests regularly leave absurd orders, like raw meat or ammo in a mug, and payment is made with bottle caps.