This achievement is story related and cannot be missed.
This is the same as the similarly named achievement from the original 360 version.
Here is the original solution from Wayens.
Remember the Earthcaller? Keep this guy handy as it will be helpful and not just for opening doors. The blast of air it makes actually stuns many enemies... including... the Phantom Guard boss!
But before that, some tips:
Water: always test the waters, you never know what you might turn up. In this case, in the library bottom level there's a pool. Dive down it to receive something special.
Crows: these black birds are actually a good source of protein, green life protein that is, when you see them don't be squeamish if you're low on life, kill them ;p
Lavadudes (sorry didn't get their names): these big hulks are annoying as heck in their taunting and chasing but between levels in the library where you meet them, there's a ledge. Stay on the ledge and lure these bad boys to the edge of it. You'll be relatively safe to hack them from below or above. At least their explosion won't be a problem. ;)
Minions: and don't forget to B attack those zombie minions! B attacks shake out the life force from them giving it to you. Especially on Apocalyptic difficulty, life is important, don't miss your chances to get some if you need it!