Sir-Tech Wizardry
I purchased my first computer, the Apple //e (64K RAM, Two 180K single sided 180K 5.5 inch floppy disk drives and a monochrome monitor) in 1984 for the sole reason of playing the Sir-Tech "Wizardry: Proving Grounds of the Mad Overlord" game. This is a very close and very good clone of that game. In the original game, you create your six person party and using a pencil and graft to map, enter a dungeon that is 20x20 block in size and 20 levels deep. As in D&D, you gradually increase your character's abilities to go deeper into the dungeon until you locate the Mad Overlord. No 3D graphics. No automapping. No mouse.