Brink

This achievement asks that you complete each of the missions for the SECURITY forces on the WINNING TEAM, including the What-If missions. These are:

Day 1: Hostage Rescue
Day 3: Smash and Grab
Day 4: Dirty Bomb
Day 5: Prison Break
Day 6: Early Launch
Day 8: Fallout
What-If: Chopper Down
What-If: Grand Theft Aero

Must be completed on a single character, but can be unlocked online and offline, in Solo, Co-op, or Versus. Simply select Campaign from the main menu, select your mission of choice, and tweak the settings to your liking. Difficulty is unimportant. Missions you have won will be displayed with the round checkbox next to them filled in.

All in all this achievement isn't very difficult. The most challenging part to this achievement is Security's Day 6: Early Launch. So i have written a solution for this mission specifically.

The first part is simple, repair the crane controls. Play as an engineer and either constantly try to repair the controls and when you get down wait for a medic, then resume hacking. This is more of a kamikaze method. Or secondly, play as the engineer again and use turrets, mines and damage buffs to your liking. This will create a 'safe' area for you and your team to repair the crane. Remember you can buff your gun damage by holding too!

For the second objective things seem to become overwhelmingly difficult and your team seem to have a problem assisting you in ANY way. My first choice here was to become an operative and get the job done myself...Wrong!

For this section i remained as an engineer, i fought my way to hacking objective and just off to the right you will see a small, dead end hall way with 2 entrances/exits. Haul ass inside here and set up a turret in the left-most door (While facing hacking objective), and then place a proximity mine in the other entrance. Camp here and help your turret fend off the Resistance, whilst doing so your team will start to hack the objective.

If you keep on top of the enemies and repair your turret when it's needed a.s.a.p you shouldn't have an issue. Upon trying this method i done it first try.

And, as always with this game, i found having a heavy build character to be vastly superior.

Tl;dr:
Camp in hallway off to the right.
Turret in one door, mine in the other. (Play as Engineer)
Wait for your teams operatives.

*Leave comments if you think i can make improvements.