Something about a game i need information?

i want to buy a game for my PSP so just one game and i don't no which. should it be God of War Ghost of Sparta, Ben 10 Ultimate Alien: Cosmic Destruction, or LEGO Pirates of the Carribean I know Ben 10 and LEGO Pirates of .... sounds childish but they are still good games so what should i buy i need an answer. BTW i'm 13. I KNOW THIS ISN'T THE RIGHT SECTION BUT NOBODY ELSE WANT'S TO GIVE AN ANSWER.