19 Nov 2009 19 Nov 2009
It's fairly obvious how you get this legit, but if you want to boost it... well, it's not as easy as you would think. If you down a teammate and then try to revive them, it won't count towards the achievement.
However! You can do this quite quickly if you'd like. Pick The Park in the Parish campaign and run towards the trailer that you have to enter before the crescendo. There should be adrenaline in there, but if you pick some up along the way, that will obviously work as well.
So, you have adrenaline, you're in that trailer, and you haven't stepped outside to start the crescendo. Switch to expert and kill one of the bots, making sure not to down the other two. You can soften them up a bit, but you can not down them even once or reviving them will not count until you restart.
Now open the door, step outside to start the alarm, and step right back in. Let the zombies down one of them, the other bot will try to pick him up, and in doing so, the zombies will down him as well (remember, you're on expert, so this takes no time). Switch to easy if you like, clear the room as much as possible, use your adrenaline, and pick them both up.
Repeat as needed, and achievement unlocked.