If I recall correctly from when I played "The Colossal Cave" on a paper terminal, there was one room where the entrance was too small to take your torch inside. The "solution" was to drop the torch while it was on and then enter the room. It would say something like "you are inside a small cavern with an aerie green light showing through the entrance. There is an emerald laying on the floor". Then take the emerald, leave the room and pick up your torch. It was somewhere in the early 1980's, and my memory has faded on this. Plugh!
Probably this is the most nerdish poll ever. If i guess right it is about some strange console game from the stone-age. To be honest: In these years my friends/girlfriends and me had other trouble: smoke a little smoke and drink a little drink (if money was available). Else we tried to have some other fun for free. Computers were for scientists/military (we believed so) or part of science-fiction movies. I was glad to have a bike. Very important to reach all the funny events on saturday night in a hurry. And we played other more realistic/naturalistic games - like: "I show you mine if you show me yours..."