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Get the metal pipe. Kill the first zombie with 8 Handgun SG Bullets with Close Distance. Before go into B7F Chemical Room, equip the metal pipe and crash to the wall to the broken metal pipe. Throws the broken metal pipe to the zombie in Chemical Room to crash it down, then shoot 6 Handgun SG bullets with Close Distance. In B7F Experiment Room, gets the First Aids Spray and store it in the bag. (This First Aids Spray will give to the man in B7F duct and retrieve 5 Gray Bottles) Kill the zombie at B6F Security Centre with a Gray Bottle and 1 bullet of Handgun SG with Close Distance. Throws 2 Gray Bottle and 2 bullets of Handgun to break the toolbox. The Magnum contains 1 bullet only, the Shotgun, the Handgun SG still not enough to kill the G. After complete to shoot with Magnum and Shotgun, equip the Handgun SG and shoot to it with safety distance with 5 bullets. Activate the cable car to crash it to die. I sorry everybody I am too late to upload this video. I think I retry over 200 times and spend over 100 hours to clear this scenario without taking any damage and let all the partners survive.
