bugünün ctrl v vakti geldi çattı

complete the gallery.

this is by far the longest and most annoying trophy, probably even your last.

when you've beaten every level in the scenario mode, ("scenario expert") and the arcade trophy, team battle trophy, survival trophy, ghost battle trophy, and have unlocked a movie in the arena ("night at the movies"), you should just be missing:
all (but one) endings (you get them when you continue playing scenario. just do nina's stage, jump off the train and repeat 6-7 times for one ending. note: some characters have 2 endings, e.g. armor king, jin... , which means that some endings may take longer.
all (but one) prologues (you get them while playing in arena and quitting right in the first stage)
and... time attack! some people notice that they've done everything, but the time attack! you have to set a record in time attack to complete the gallery section "statistics" (i think it's called like that). note that this is unnecessary to some trophy-hunters, but i got mine like this.
and then.. bling! trophy acquired.