The Gods Arcem needs:Sheldon

A translucent blue image of a bald middle-aged man in robes and a neat beard. An AI living in the mine fort, developer of the anti angel CH Omega project and VX Rho.

http://i.imgur.com/ucvoOhm.png

His home.

   Marcus (and possibly Nemausus) need to go through sector four. As Sheldon promised, it's a mechanical workshop, which seems to actually be in use. Half-disassembled spiderbots and hoverbots lie on dozens of workbenches in the middle of the room, and more on storage shelves lining the walls. There are other parts too but it seems the majority of this space is devoted to maintaining the robotic population.

   To the left, the door to sector 1 is marked "COMMAND" with a large yellow sign with black lettering. A similar sign marks the door to sector four as "CHEMLAB". Throwing a glance behind you, the round empty room was apparently "RECREATION".

   Continuing to the chemlab, Marcus (and whoever follows) finds half a dozen large gas tanks as tall as the room, three on each side of the room, each with what looks like a test chamber and some smaller fume hoods attached by a pipe. Here too, shelves line the walls with various bottles of glass and steel lined up on them, and the furthest half of the room seems to be devoted to synthesizing. The second tank on the left as you enter has a hole punched in it. It's marked "CH Omega". The one opposite is marked "VX Rho". The other four have no obvious markings.

   If they look where the door to the central chamber should be according to Sheldon's map, there's no door, but there's a slight depression and screwholes for a sign above where the door ought to be. The sign is also non-existent.