"Information is Power" cheevo.<br />
Go to Levelselect, Level Absolution, its near where you have to enter after finish the 3 Enemys.<br />
The first are going left and you can climb up behind him. Second comes near where you can kill the first.<br />
And near the third, on a Box you find the collectible.<br />
Tested on a dummy and works great.<br />
"Damage Control" pops too after killing the last one.