| Programming (id Software) |
John Carmack, Jim Dosé, Robert A. Duffy |
| Art (id Software) |
Adrian Carmack, Kevin Cloud, Seneca Menard, Fred Nilsson, Kenneth Scott |
| Game Designer (id Software) |
Graeme J. Devine |
| Level Design (id Software) |
Christian Antkow, Mal Blackwell, Jennell Jaquays, Tim Willits |
| CEO |
Todd Hollenshead |
| Director of Business Development |
Marty Stratton |
| Office Manager and id Mom |
Donna Jackson |
| Development Assistant |
Eric Webb |
| Programming (EA) |
Andrew Carr, Peter Crossley, Neil Martin, Iain Melvin, David Picon, Nick Tuckett, Matthew Whitton, Michael Willis |
| Additional Graphics Programming |
Martin Griffiths, Leon O'Reilly |
| Additional Programming (EA) |
Oliver Castle, Austin Ellis, Tim Green, Mark Huntley, Chris Killpack, Andrew McDonald, Jarl Ostensen, Brett Paterson, Morten Pedersen, Angel Sastre, Richard Smith |
| Art (EA) |
Adrian Crofts, Kevin Duffy, Ian Faichnie, Joe Groombridge, Ian Inniss, Mike Man, Darren Pattenden, Chris Wood, Daniel D. Wood |
| Production |
David Amor, Stephen Murray, Alex Peters, David Ratcliffe, Jonathan Taylor |
| Level Design (EA) |
Alex Gingell, Dan Haigh, Thomas Heaton, William Joseph, Lee Mercer, Sean Soucy |
| Audio Production |
Adele Kellett, Mark Knight, Nick Laviers, Bill Lusty, Elaine Williams |
| Voice Talent |
Karina Fernandez, Armand Hargett, Lewis Macleod, Richard Ridings, Frances White |
| FMV |
Jason Lord |
| QA |
Nick Barrett, Tariq Bell, Wayne Boyce, John Brunton, Toby Bushnell, Robert Charlish, Emmanuel Delva, Ian Fuoco, Ramon Gamma, Bruce Glazier, Joe Grant, Andy Hall, Donna Hicks, Jay Huckstep, Giro Maioriello, Chris McBride, Andrew Miller, Rupert Moss, Jordan Nigrelli, Joe Nunn, Thomas O'Connor, Jonti Pitt, Stuart Pratt, Matt Price, Marcus Purvis, Dermot Rawson, Sam Roberts, Pat Russell, Peter Samuels, Nick Sewell, Daniel Babeshko-Helsen, Allan Speed, Greg Stephen, Dan Tilbrook, Matt Whayman |
| US Test |
Jose Gonzales, Edmund Huey, Erin Lambaunas, Ludon Lee, Jason Morales, Sean Naberhuis |
| Localisation (UK) |
Sandra Picaper |
| Localisation (Italy) |
Rebecca Gordon, Clare Parkes, Alessandro Tajana |
| QA Tester (Italy) |
Pasquale Stacchiotti |
| Voice Talents (Italy) |
Marco Balbi, Marco Balzarotti, Roberta Laurenti, Claudio Moneta, Luca Sandri |
| Localisation (France) |
Nathalié Duret, Christine Jean, Véronique Viretto |
| LT (France) |
Lionel Berrodier, Bruno Bocquin |
| QA Tester (France) |
Samy Benromdhane |
| Voice Talents (France) |
Michel Barbey, Nanette Corey, Gérard Dessalles, Bernard Lanneau, Martial Le Minoux, Serge Thiriet, Raphaëlle Valenti |
| Manual & Documentation |
John Featherstone |
| Manual Design and Layout |
Caroline Dartnell |
| Pack Design & Layout |
Candice Westman, Jenny Whittle |
| Marketing & Public Relations |
Felicity Knights, Susan Oelschlegel, Lidia Stojanovic |
| CQC |
Andy Chung |
| Special Thanks To |
Chris Baker, Cruz Chilaka, Martina Gadringer, Martina Gadringer, Simon Harris, Richard Hilleman, Mark Huntley, Andrew Lacey, Richard Leinfellner, James Lenoël, Jeffrey Litz, Mark Mahin, John Miles, Thomas O'Connor, Ian Shaw, Lisa Stokes, Erik Strickland, Rajan Tande, Daren Watson |