I suggest for the best gaming experience, if you have not finished the game yet, stop looking at this solution and the trophy list and come back after you have finished your first playthrough.
I can confirm you need to see no more than 8 different endings. Not 10, 11 or 24 like some sites are suggesting!
Here's what to do-Play 1-
Don't look at the trophies!
I think I have covered everything if anyone has any suggestions, comments, questions or information to share feel free to PM me or leave a comment.