I think Greg is missing the final boss . For example the materials of the top get Greg matter :Matter: , push in Fusion Reactor Mk3 :MFS-Unit: . Serve energiyu and get the portal :Force Field: . Go to the very Ultimate Battery :HV-Transformer: (this is the pass :Dynamite Remote: ). There boss Gregorius . After killing :Mining Laser: the boss get completely full Ultimate Battery :Nuke TNT: . And cheers, Greg passed completely . That's such nonsense, I guess .