Brink

This achievement wants you to become incapacitated, and get back into the fight without joining the next Redemployment wave.

It can be gained in any game mode except Challenges, in solo, co-op, or versus, and all it requires is that you make like 50 cent and sponge up enough bullets to put you in the ground, then get a nearby teammate to pull you out of the fire.

Once you're downed by enemy fire, simply highlight the "Wait For Medic" option (I find that the AI is more inclined to come help you if you're waiting for a medic, rather than hovering the "Join The Reinforcements" option.) and await a friendly medic to dispense a syringe.

Now, if you're like me, and i suspect a couple of people did this (you know who you are!) - you're wondering how to use the syringe. It doesn't exactly telegraph this pretty important piece of information. Simply DEPRESS AND HOLD the LEFT STICK for a moment, and voila.

Most Brink achievements are more easily attained in Solo play.

Without sounding like Captain Obvious. When you get shot choose the option wait for a medic. Once he throws you a "revive stick" press down on the left stick and PLOOP!

I did this on a Free Play session on Shipyard.

Game mode: Objective
Play mode: Solo
Match settings: Min Team Size = 0