OK... I am left with 3 skills to complete my game. Feathers and Colors (Auditore Cape) are no-brainers as you have to get one to get the other. My problem is the fly swatter. I missed this during regular play. I have seen that I have to restart the game to get it because you cant go back and play... blah blah blah.
My question is this: If I go back and restart a new game, will I lose everything I have worked on? (achievements, 955 of 1000 etc etc)
If this sounds noobish it is... I JUST got an Xbox360 after banging away on an original Xbox for so many years lol