JoeTheBro on 28 September 2012
As is the list is great and is a day one for me solely because of Nathan Drake.
However I can almost guarantee more characters are to come. Kat from Gravity Rush has supposedly been spotted in an official image from SuperBot and from a few potentially faked images leaked online. From the official image it is hard to know for sure it is her but we can tell it's not one of the already listed 20 characters. Either the game is being shipped with hidden unlockable characters or they are money hungry and have DLC already made.
