Middle-earth: Shadow of Mordor - Game of the Year Edition

Just a heads up, rather then a guide.......you won't be able to unlock this achievement until you unlock the skill "Dispatch", which is in the last Ability tier........last skill on the bottom

Finish the last sword legend mission located on the second map at Fort Morn........and the achievement is yours......

You have to do story missions and some red icon side missions to get enough "power points" to unlock the last tier