Jim Dethlefsen (Derf)

Jim Dethlefsen (alias Derf) is a Doom level designer who was a member of TeamTNT and The Wad Crew, and contributed to their projects.

1995

 * The TWC Wad Collection December 95
 * Stalingrad (DF-SGRAD.ZIP)

1996

 * The TWC Wad Compendium January 96
 * MAP09: Kharkov
 * The TWC Wad Compendium March/April 96
 * MAP04: Leningrad
 * Bloodlands
 * Grievance
 * Grievance
 * Grievance
 * Grievance
 * Grievance
 * Grievance

1997

 * The TWC Wad Compendium November/December 96
 * MAP09: Death Fiesta