There are no requirements for the mission. The mission is called CO 02 Ste Hunt Nagarack.
This mission took some ideas from Splinter Cell Conviction Hunter Mode. You must eliminate all targets in Nagara. If you are detected, you must eliminate all the targets in Nagara plus reinforcements.
I have thoroughly tested and beat this mission. I did not get perfect stealth, but I did manage to eliminate all tangos without picking up an OPFOR weapon. Hint for those who play, 1 shot 1 kill :)
Check out the mission here