This is an easy way to get the Mission from God Achievement (surviving 5 minutes at a 5 star police level). Go to the docks near "Drassanes" on the map. Shoot one civilian to get a 3 or 4 star level. When the police show up shoot at them till you get a 5 star level. Then turn around and run down the stairs and to the end of the dock. Stay as close to the wall as you can so the AI can't see you and you will be safe. There is a glitch that will kill you if you try to look up at the police from that position so just wait it out.