I am not 100% sure about this, but the first game I actually remember GMing was James Bond 007.
Talk about a cool game! Who does not want to be a secret agent with cool toys and a license to kill?
The introductory adventure is actually the Island of Dr No! Rules for ranged combat, SCUBA diving, gambling and just all around being cool and sophisticated.
Looking back, there were definitely some strange things going on, system-wise, but the game really was fun.
Now, even though I still love the game, I cannot fathom running this for a group of people the way it sits. As per the James Bond universe, there are only ever nine "00" agents. These agents are usually solo, or working with SAS agents. For a long time, there were only 2 or 3 of us playing at a time, so it was no big deal. As I grew older, and found more gamers, running a game of JB007 became something of a problem. Everyone wanted to be a "00" agent, but who can blame them?
I still have the same boxed set from way back when, and the Q Manual. In the 90s I was able to pick up a copy of On Her Majesty's Secret Service, Thrilling Locations and For Your Information.
I still absolutely love this game.