I remember standing at a Radio Shack and admired a simple-looking fellow in a dungeon on a computer monitor. I pushed a few buttons on the keyboard and got the man to move about, and eventually jump.
I was amazed at the fluid movement animation that even had inertia. I made my way through the dungeon and came across another man, who came at me with a sword. The other man proceeded to kill my avatar and I figured out that I needed a sword for my character—who turned out to be a prince.