Langdon's official contributions for White Wolf include the following:
Interior Artist[]
- 2004/June: Aberrant: Aberrant d20
- 2004/March 1: MTAs: Ascension (book)
- 2003/September 1: MTAs: Tradition Book: Sons of Ether
- 2003/April 28: MTAs: The Infinite Tapestry
- 2003/February 3: MTAs: The Fallen Tower: Las Vegas
- 2002/November 11: MTAs: Mage Storytellers Handbook (as "Landon Foss")
- 2002/October 28: WTA: Book of the City
- 2002/January 14: MTAs: Convention Book: Iteration X
- 2001/August 6: MTAs: Guide to the Traditions
- 2001/February 5: MTAs: Tradition Book: Akashic Brotherhood
- 2000/October 16: MTAs: Sorcerer Revised
- 2000/August: Aberrant: Aberrant Worldwide: Phase I
- 2000/July 24: MTAs: Blood Treachery
- 2000/June 12: Aberrant: Aberrant: The Directive
- 2000/March 20: MTAs: The Bitter Road
- 2000/March 6: MTAs: Mage Storytellers Companion
- 2000/January 3: MTAs: Mage: The Ascension Revised Edition
- 1999/July: Aberrant: Aberrant Rulebook
- 1999/July: Aberrant: Aberrant Rulebook (limited)
- 1999/March: Trinity: Trinity Rulebook (softcover)
- 1999: MTAs: Guide to the Technocracy
- 1999: MTAs: Initiates of the Art
- 1998/December: Trinity: Shattered Europe: Psi Order Æsculapian and Europe Sourcebook
- 1998/September: Trinity: America Offline: Psi Order Orgotek and FSA Sourcebook
- 1998/August: Trinity: Darkness Revealed 2: Passage Through Shadow
- 1998/June: Trinity: Trinity Technology Manual
- 1998/March: Trinity: Darkness Revealed 1: Descent into Darkness
- 1998/February: Trinity: Hidden Agendas: Trinity Storytellers Screen & Book
- 1997/November 10: Trinity: Trinity Rulebook
- 1997/October: Trinity: Trinity Rulebook (limited)
- Exalted's Exalted Rulebook
- Trinity's Alien Encounter 1: Invasion
- Trinity's Alien Encounter 2: Deception
- Trinity's Aurora Australis: Psi Order Legions & Austronesia Sourcebook
- Trinity's Stellar Frontier: Psi Order Upeo wa Macho & Extrasolar Space Sourcebook
- Trinity's Trinity: Battleground (box)
- Trinity's Trinity Players Guide
- Trinity's Trinity Technology Manual
^ Langdon Foss's name was accidentally left out of the credits. He was acknowledged in the Hidden Agendas: Trinity Storytellers Screen & Book.