There's a famous speed run from Fallout 1 which uses the "press A fast" exploit which I found a bit lame. So I tried myself and managed to beat the game in 10 minutes without using that trick.
Nevertheless, I suppose this speedrun is not completley exploit free:
- Running away from the Lt. is usually considered an exploit (2:08 and 3:00)
- Entering combat after trigging the autodestruction at the cathedral might be considered an exploit (9:40)
I ran through the game with the highest difficulty settings!
It took me a lot of planning to get this done (several hours).
If you have any questions, send me a message.
Note: From now on, I'll be deleting offensive, improper or immature comments. Try to maintain a constructive discussion because Fallout 1 was a great game!