Note the above solution is more detailed and a better solution overall, however as i am transferring every solution from PlaystationTrophies .Org trying to populate TT with more solutions, ill still be posting lower their solution.
This is a story related trophy and cannot be missed.
*** Spoiler - click to reveal ***This is the section immediately after acquiring the Spear of Destiny. It's basically you just completing a quick time event. When you reach the other side, the trophy should appear.
All credit goes to original authors at playstationtrophies.org, and this is merely updating truetrophy fans with these guides.
http://www.playstationtrophies.org/game/god-of-war-ii/trophy...