Facing The Dragon, Power On, and Trample on level One!

Facing The Dragon, Power On, and Trample on level One! Step By Step: - Have two people collect 750 points and leave a zombie, - grab as many parts as you can on the floor, (Ones on the desk outside and I recommend to open double door) - ride first elevator that falls and open power room door, - ride an elevator to the top of the building, - then climb the ramp and face the dragons face, (achievement will unlock) - look behind you and jump the gap to the workshop and make the Trample, - go up the elevator to grab the rest of parts, that's if you don't have four players to grab all the parts from the start.