| Programming |
Davor Hunski, Alen Ladavac, Dean Sekulić |
| 2D Art |
Davor Hunski, Petar Ivanček, Dinko Pavičić |
| 3D Art |
Admir Elezović, Tomislav Pongrac |
| Game Design |
Davor Hunski, Roman Ribarić, Davor Tomičić |
| Level Design |
Davor Hunski, Dean Sekulić, Davor Tomičić |
| Music |
Damjan Mravunac |
| Sound |
Damjan Mravunac, Roman Ribarić |
| CEO |
Roman Ribarić |
| Serious Sam Voice by |
John J. Dick ("Booger") |
| Moral Boost by |
Richard Gray, Old Man Murray |
| amp11lib library by |
Niklas Beisert |
| Additional Programming |
Damir Perović |
| Additional Moral Boost |
Michael Harris, Matt McGill, Korey Peters |
| Additional Artwork |
Hrvoje Čolić, Mladen Tripalo, Aleksandar Vještica |
| Manual |
William Haskins |
| Serious Testing (Tarantula Testing Suite) |
Philip Alexander, Timothy Bates, Kit Brown, Paul Byers, James Cree, Philip Deane, Robert Dunkin, Denby Grace, Matthew Hewitt, Kevin Hobson, Lee Johnson, Charlie Kinloch, Mark Lloyd, Andrew Mason, Julian Turner |
| Serious Testing (TalonSoft) |
Joe Covello, Frank Kirchner, Ryan Littlefield, Kai Ma, Lisa Nawrot, Joshua Noll, Josh Rose, Phil Santiago, Stacey Sharpe, Anne Takeuchi, Stephen B. Thomas, Scott Vail, Chien Yu |
| Special Thanks |
Michael Abrash, Duck Aiea, Michael Belovesick, John Bergerud, Joey Blankenship, Jim Bloom, Aljoša Brajdić, Barrin Buchana, Silvano Bucic, Aaron Burton, F. J. Campos, John Carmack, Newton Cheung, Vernon Chiang, Chia Chin Lee, Sean Coyne, Marko Dabrović, Kif Davis, Shaun Davis, Danko Dolinar, Sebastien Domine, Alex Duigan, Matt Fairclough, Joshua Galloway, Keith Galocy, Mark Gergaghty, Elio Del Giudice, Kevin Glowacki, Slava Gostrenko, Jim Hafner-Eaton, Brian Harvey, Mike Hawks, Chris Hecker, Bernd Holtmann, Michael Horvatek, Robert Howarth, Marshall T. Ireland, Paul Jacobson, Dean Janacek, Zoran Janković, Dorijan Jelinčić, Kristina Jeren, Joseph Kain, Hannu Kankaanpaa, Garret Keirns, Josh Kellas, Randy Kimmett, Igor Korta, Branimir Kovač, Joseph Kreiner, Julian Kreisler, Jurica Kresonja, Jessy Lecomte, Russel Leonard, Chris Lock, Samantha Lynn, Leonardo Magdić, Ian Mayall, Eric McCall, Matthew McClure, Harry Miller, Scott Miller, Jason Mitchell, Doug Myres, Terry Nagy, Kresimir Nesek, Vjekoslav Nesek, Jan Van Oekelen, David R. Oldcorn, Daniel Omachi, Mike Orciari, Daniel Peacock, Matt Poole, Chris Porosky, Mitch Potts, Zach Rand, Scot Ranney, Jasim Redžepagić, Scott Riddle, Hrvoje Rončević, Zdenko Sabljić, Goran Sarlija, Joost Schuur, Kenneth Scott, Marko Sekulić, Hazard J. Simpson, Elias Slater, Derek K. Smart, Jeff Smith, John Spitzer, Jos Stam, Marko Stifanić, Rick Stirling, Sam Stone, Kevin Strange, Christian Studer, Shawn Swift, Brandon Taylor, Nicolas Thibieroz, Tim Tibbetts, Jonathan Trainor, Nick Triantos, Teo Valić, Randy J. VanderHeyden, Roberto Vdovic, Luke Vernon, Damian Wegner, Michael Wenn, Charles Whatley, Billy Wilson, Mike Wilson, Devin Winterbottom, Chet Witkowski, David Wright, Gabriel Yehia, Zoran Žmirić |
| Mega serious special thanks goes to |
Robert Westmoreland |
Take 2 Europe |
| Producer |
Michael Wenn |
| Assistant Product Manager |
Gary Sims |
| Group Production Manager |
Jon Broadbridge |
| Group Production Co-ordinator |
Chris Madgwick |
| UK and International Marketing Manager |
Sarah Seaby |
| International PR Manager |
Amy Curtin |
| PR Executive |
Mark Allen |
Take 2 Interactive Germany |
| Marketing Director |
Matthias Wehner |
| Product Manager |
Gabriel Wunderlich |
| Marketing Assistant |
Markus Neumann |
| PR Manager |
Jochen Färber |
| PR |
Karl Unterholzner |
| Online Manager |
Alexander Harlander |
| Localization |
4-Real Intermedia GmbH |
Gathering of Developers |
| Business |
Robert Westmoreland |
| Producer |
Joshua Galloway |
| PR |
Jeff Smith, Andrea Villareal, TSI Communications |
| Marketing |
Jim Bloom, David Eddings, Devin Winterbottom, Toni DeValdenebro, Mike Wilson |
| Online |
Doug Myres, Scott Dudley, Mike Donaghue |
| Creative |
Scott Crowell |
| Manual |
William Haskins |