1. If theres someone you need to meet or a place you need to go to and its not there its best to start over again because you have probably mist a clue or you didnt get the right info of someone.
2. When you are chasing Izo never try to leave the place you are in because Izo will come out of the shadows and kill you with his sword.
3. When chasing after Zuben always run out of the kitchen past the dumpster up the stairs in the next room and double click on the door infront of you this will alow you to talk to Zuben or you can just shoot him and get the photo of his corpse if you go back to your apartment you cant talk to him or get the photo of him.
4. Always make shaw that you have all the clues for act 1 other wise you cant talk to Spencer Gregorian and get clues of him if you dont talk to him Izo wont say much to you and you will have to start over again.