Y - Rustyslacker and Osiris E - Tchakkazulu A - ThomasJ
13 years of Doom doesn't have a consistent theme. It was just a project to get some of the mappers together to make a tribute to Doom style map. The map is built inside and around the letters "13 YEARS OF DOOM", with each letter made by different author. No, I don't know what you're talking about. What do you mean "late"? Anyhow, I'm not 100% sure of the credits, as the development cycle was rather long. Apologies to those who I may have forgotten. Have fun! It's never too late to celebrate Doom's 13th birthday!
Everyone who encouraged Fatal to finish this thing up Beta testers at The Abyss (http://z8.invisionfree.com/Thy_Abyss/index.php?) (Ace, Kekkimaru, Nomad and Osiris)
New from scratch
If some were known, we would've fixed them now hadn't we?