Completionists looking forward to strapping themselves in Da Vinci's flying machine in Assassin's Creed II will need to pick up the game's PSP version as well. Speaking during Sony's E3 2009 press gathering, Ubisoft revealed that the upcoming sequel will feature unlockable weapons, which players will only be able to unsheathe by connecting the game to the series' upcoming PSP debut this holiday. Animus compatibility, however, is still a ways off, so we're told.