User blog comment:Jim Logan/My Blog/@comment-4902732-20120409002742

No, you can only have one hidden blade and the hookblade. Completing certain things in-game. No, Oliver Bowden, for some reason, changed some of the codex equiptment ex. the hidden gun popping out into a pistol. And the last question, there are no "missions" in AC1 but the first one in AC2 is Boys Will Be Boys.