the last level I did was awesome as HELL guys! I got the Fifth Freedom already (only the third level), which basically means you do whatever it takes to accomplish your task. License to kill and be seen. Kill or be killed. It was truly awesome. Had to waste about TWENTY guys (that's a lot for Splinter Cell) in a period of about 10 minutes. We're talking sniping, AND hand-to-hand combat. Sticky shockers never looked so good. It was the most badass thing I have ever done.
Spoiler:
There was also one of those "you have literally one second to shoot this person RIGHT NOW or the mission's over, don't think, just do it." It happened to be a cool character too 
They haven't explained why I did it yet...but I was going down an elevator and the person I had to kill was a friend. They were on the floor that I got on the elevator at, and when the elevator started going down, Lambert chimed in and was like "SAM, DON'T THINK, JUST SHOOT THEM RIGHT NOW!" Crazy...