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Only War: Core Rulebook

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Only War: Core Rulebook
Released 2012
Pages 397
ISBN ISBN 9781616614690

General Structure

The Only War Core Rulebook was published in 2012 and contains the core rules for the Only War Warhammer 40,000 role-playing game system. It also contains new and expanded background for worlds in the Spinward Front of the Calixis Sector.



Fantasy Flight Games

  • Designed by Andrew Fischer with additional concepts by Mack Martin and Sam Stewart
  • Lead Developer: Andrew Fischer
  • Writing and Development: Owen Barnes, Max Brooke, Nathan Dowdell, John Dunn, Matthew “HBMC” Eustace, Tim Flanders, Ian Hardin, Andy Hoare, Jason Marker, Mack Martin, Charles May, Brandon Rospond, and Sam Stewart
  • Based on Dark Heresy, Designed by Owen Barnes, Kate Flack, and Mike Mason
  • Editing and Proofreading: Graham Davey, Alex Davy, Matt Harkrader, and David Johnson
  • Graphic Design: Edge Studios, David Ardila with WiL Springer
  • Cover Art: Sam Wood
  • Interior Art: A.L. Ashbaugh, Alberto Bontempi, Matt Bradbury, Sam Burley, Jon Cave, Mauro Dal Bo, Javier G. Ureña, Diego Gisbert Llorens, Zach Graves, Ilich Henriquez, Nikolaus Ingeneri, Michal Ivan, Jason Juta, Anton Kokarev, Mathias Kollros, Sam Lamont, Simon Lissaman, Jorge Maese, Marco, Morte, Sean Andrew Murray, Ameen Naksewee, David Auden Nash, and Mark W. Smith
  • Managing Art Director: Andrew Navaro
  • Art Direction: Andy Christensen
  • Production Management: Eric Knight
  • Licensing and Development Coordinator: Deb Beck
  • Executive Game Designer: Corey Konieczka
  • Executive Producer: Michael Hurley
  • Publisher: Christian T. Petersen

Games Workshop

  • Licensing Manager: John French, Andy Hall, and Owen Rees
  • Head of Licensing: Jon Gillard
  • Head of Licensing, Legal and Strategic Projects: Andy Jones
  • Head of Intellectual Property: Alan Merrett

Publication Details

  • ISBN 9781616614690