Completed Uncharted 3 London Crushing Co-op 3 players gameplay

README: Me and my buddies 'dkf360' and 'lasersights' on London Underground coop adventure on crushing difficulty. I was experimenting with loadouts - Explosive Expert (Level 3), Team Safe (Level 3) boosters and Protector Kickback. We lost quite a few lives in this relatively easy map. 'lasersights' had the useful clusterbomb kickback. 'dkf360' only had the t-bolt rifle kickback, since he recently legacied. Getting choked is useful for your partners, since releasing a choker will net you the 'Let em go' medal as well as work towards your melee based medals (eg. 'Punch Out' and 'Covert Ops'). So if you can afford it, get choked and released instead of just killing the chokers while they are running toward you. A few tricky areas in this adventure, otherwise, it is quite short and fun.