I'm Just finnish the 2º check of the forum guide.
I'm almost sure that the achievement it's bugged and can't be repair.
Adding these, i have read some comments at splitplaythru video guide (www.youtube.com/watch?v=3xO1DByrb0A
) that says they follow for 1 to 1xx video and didn't get the achievement and after this... i thrust them.
Anyone know something about these?
(Last chance is get New Game+ and follow splitplaythru guide, but i hate this game hardly right now