1. When on a covert Mission don't draw fire
2. If some one is firing at you, KILL them unless they are a tank.3. Do not fire at the outside of a building unless you are in a tank.
4. Don't draw attention
5. keep a low profile.
6. Don't Let n00bs help you on your covert Mission
the Reason i'm posting this is because i have had an encounter with the most retarded n00b in the game during the demo. Before i knew that he had a mental problem he wanted to help me on my mission. I accept his offer and go as hot wire to the emeny tunnle, while he goes as patch. so we're almost there and no one's fired at us, when he deiceds to break the scilence and fire at all the nods around us, and of corse draw fire and get me killed. I call him an idiot and tell him not to and he says "it's better than getting stabbed in the back". so I go again but he follows again but this time he dosn't draw fire, but instead runs stright into the mined tunnle, thus altering all emeny around and getting me and him killed again. So i tell him not to come, but he insits on going again, luckly the tunnle isn't remined so we sneak in with no trouble and when we get to the 2nd tunnle opening(by the powerplant) he starts firing at it, and gets us killed again... after that he says "Lets mamoth tank rush the oblisk instead of taking down the powerplant", we disagree and finily, and thankfully he goes his own way, while i make my way back to nod's powerplant and manage to get inside and blow it up.
Moral: Make sure if you take a partner on a Covert mission that he's not brainless or a n00b.