"Attack" and "Canyon" maps by:
Tim Willits
"Black Tower", "Bloodsea Keep", "Mephisto's Mausoleum", and "The Express Elevator To Hell" levels by:
Sverre Kvernmo
"The Catwalk", "The Combine", "The Fistula", "The Garrison", "Subspace" and "Subterra" levels by:
Christen David Klie
"Geryon", "Minos' Judgement", "Nessus", "Vesperas", and "Virgil's Lead" levels by:
John W. Anderson
"Titan Manor" and "Trapped on Titan" levels by:
Jim F. Flynn
"Paradox" level by:
Tom Mustaine