This is a little bit of puzzle-piecing I've cobbled together through independent research. Glancing through .TXTs, searching for author info on the archives, etc.. Tom Mustaine mentions on his website/blog that the Hell to Pay project was headed by an individual named Jim Elson, and that Elson along with Jimmy "Evilgenius" Sieben and Mackey "Avatar" McCandlish helped push Perdition's Gate out the door. Now, glancing through the .TXT file for Perdition's Gate, I come across the following credit list.
Lich: Artwork, Design, Production Manager, Sound
Tom Mustaine: Artwork, Design, Music, Production Assistant
ArchDaemon: Design, Programming
Mackey McCandlish: Artwork, Design
Pavel Hodek: Artwork
Bob Mustaine: Design
Mark Gundy: Marketing
Kristin Weeks: Computer Voice
Jaroslaw Wolski: Artwork
Now, for some connecting. I've actually reviewed one of Pavel Hodek's works, Galaxia. He's also a fairly prolific author in the archives, particularly with deathmatch mapping, though he's worked single player into all the levels (as far as I have seen). Hodek was also one of the primary authors behind H2H-Xmas (which I will be reviewing in the near future), supplying 8 of the 32 maps of the series. It started as a branch off from a small mapset derived from the Head-to-Head International Doomers Competition (read more about it here on Doomworld, the sixth paragraph of ).
The original H2HMud team: Dave Swift aka "Mud", Jimmy Sieben aka "Evil Genius", Greg Lewis aka "Tree", Mark Gundy aka "Mag", and Jim Elson aka H2HMud. From what I gathered in a .TXT of a map by Jimmy Sieben, Elson ran the original H2H competition, and incidentally headed the H2H-Xmas project given his status as "Quality Control & final assembley". So, this establishes Elson as having project leadership skills, and working together with both Jimmy Sieben and Pavel Hodek, as well as Mark Gundy. I'd say H2H-Xmas planted the seeds of the Hell to Pay project, at least.
Here's something that confused me. Perdition's Gate lists neither Jim Elson nor Jimmy Sieben as having worked on it, yet we can clearly see from Tom Mustaine's own recollections that they did. Two people credited for "Design" in Perdition's Gate are using handles, "Lich" and "Archdaemon". From this, we can deduce that Jim Elson, indicated by Tom Mustaine as the project manager and already established as a project leader , used the handle of Lich for Perdition's Gate for reasons unknown. We can also deduce that Jimmy Sieben used the handle of ArchDaemon for Perditon's Gate, again for reasons unknown. Actually, hold it.