Enslaved: Odyssey to the West

Simply finish all 19 chapters. The chapters are not too long and the transition between them usually does not involve any cut scenes and the dlc adds roughly 2-3 hours gameplay.
The chapters are:-
A MAN OF ACTION *perfect 10 only available on this level*
DEAD MAN'S PEAK (a moment to savour)
GOING DOWN
OLD ROADS
A WELCOME DISTRACTION
JAWS OF DEATH
BARE BONES
SPRING UP THE PIPE
ORGANIZED CHAOS
THE REFINERY
OLD-SCHOOL MAYHEM
THE FURNACE (Build a new friend)
UNDER ATTACK
OUT ON THE TRAIL
HOUNDED
LEAVING HOME
DOWN THE TUBES
THE DEPTHS
END OF THE LINE (What can possibly go wrong)

( ) Dictates story related cheevo that will pop after completing the relevant level.

These videos are for if you get stuck at any point in this DLC. Unfortunately these don't show where any collectibles are, they just show how to get through each level.

*I do not take credit for these videos, all credit goes to Mohala Games*