Sam Fisher ever had to fight vampires, he would probably be really confused. Perhaps he would even cry a little bit. But he would also unwittingly be starring in the Vampire Rain demo, which just hit the Xbox Live Marketplace for those with Japanese accounts. Oh, also, he had much lower production values and was named Lloyd.
If only you had a Japanese friend who didn't mind you using his account, you could see worlds collide as not-Sam-Fisher