I played Top Secret when I was in Jr. High School. It was a blast. One thing I do remember though was that friends and I figured out was that Top Secret was a lot more deadly than D&D was. One shot lucky head shot could take out your character permanently. When I GMed, my friends also learned that it wasn't a good idea to gun down a sleeping guard with an un-silenced Uzi, particularly when he had a room full of heavily armed buddies just waiting in the other room.
The end result of that mission was one team member dead, the rest captured.