SiD the Turtle said:His machette is pretty good, but not as good as the clown chainsaws. I think you get a couple of unique books, but they can't be that good if I ditched them. Also you rescue about four survivors if memory serves me correctly.
You really don't need the maintennance tunnel keyIts NOT a shortcut unless you are insane. Never ever take survivors down there. If you do want to get down there head for the carpark and grab the car or bike and cruise through the tunnels. As mentioned by someone else a few posts up there is a little section which is another room, which has an uzi and the key if you really want it.
You get a key for the room next door where 3 survivors are.
He's quite easy to kill. Chainsaw him as soon as you see him then switch to pistol / sniper rifle as soon as he jumps down a hole. He'll go to the top of one of about 4 wareouse racks and start throwing grenades. All you need to do is keep your distance, work out where he is and pop him so he comes back down. Now quickly switch back to your chainsaw and try and swipe him as he runs past. Then rinse and repeat. Note, it may take a few guns to do the job.
I've just finished the Saint's achievement. I managed to save everyone (all 53) and kill all the psycho's and as someone mentioned before I also had one very dicey moment. I had 7 survivors in tow back to the toilets in Paradise Plaza but didn't have the time to get back for a case. I had to ditch them all, run back to the security room for the case (got back with seconds to spare)then head back to pick them up. When I got back to the plaza they were all on about 1/3rd health and getting swarmed. Somehow I saved them all

Disappointingly I didn't get the Transmissionary Achivement and not really sure why not.
And as SiD says you really don't need the maintenance tunnel key. I haven't bothered with it yet at all.
Its NOT a shortcut unless you are insane. Never ever take survivors down there. If you do want to get down there head for the carpark and grab the car or bike and cruise through the tunnels. As mentioned by someone else a few posts up there is a little section which is another room, which has an uzi and the key if you really want it.
There is also a truck down there you can get, and I've seen another car on Youtube, but have yet to find it myself.