The closest you can get to being a spy is probably watching Spy Game... Spies usually don't sneak in places. Rather they hire people to do their biddings for them. Just like Russians use to come here and act american or hire americans to become traitors for money vice versa we do in other countries. The closest to Sam Fisher would be Rainbow 6. Rainbow 6 is based on Seal Team 6. 6 people only. Except Rainbow 6 is a NATO full of the best of the best of all countries.