Well i beat the resistance campaign then did all challenges etc. and now im completly stuck on the security mission day 6. i have to hack the missile but ive tried every possible strategy and none seems to work. The closest ive gotten was disguising to get there, planting then running into a little shack but then an engineer start defusing the hack box and im forced to pop out and i die.

Every.

Damn.

Time.

So what did you guys do?

Personally, I did it how I do all of my campaign missions (the first time at least). Power through it with a medium medic picking off their team while resurrecting my team. It doesn't happen immediately but it's the good old tug a war and my side ends up winning in campaign. You really need to play as a team with your bots, even though they are stupid. This game can't be won on quick tricks .

You have to be an operative for the mission

If you do it in coop just hack the one supply command post and this draws almost all of the bots away from the main objective just camp it and let you friend do the rest.

No you don't.

You only have to be Operative if you want to do the primary objective yourself.

Be a Medic, keep your Operatives alive.

and fail when the AI decides to go fight (and die horribly) with the hack box at 97%....

and revive them when they die horribly then kill their killer to win a close game.

It's the bots that supposedly "help" you. They svck. You need human players to play with. Other players are more competent than the bots. Get some friends together and you'll have better luck.

Well, as I keep saying elsewhere...

Yes, the friendly bots DO svck.

But they svck a WHOLE lot less on Hard.