Here you'll find supplementary information in various forms.
None of it is required, per se, to enjoy the main story, but you may find that these specials help fill in a few plot holes.
Out of the Ashes: Eliza's Story
It's not just her story, it's the story of her entire universe, and how it got to be where it is today.
From the Notes of Dr. Rowena Ivannova, PhD.
Everything you ever wanted to know about the Demons of Eliza's homeworld, brought to you by our resident nanorobotics professor, Dr Ivannova.
If you're looking to find a certain comic, check this out!
Mastercougar's Guide to Portals
Bone up on your portal knowledge! (Fairly old.)
Storage Devices in Reporterz
Just filling in a few plotholes. (Somewhat old.)