John Deiley is a games designer. Deiley has been working with Interplay Entertainment and Black Isle Studios. Deiley's first published game was Descent to Undermountain released in 1997. After that, John Deiley took part as the designer of Fallout 2. Later, Deiley also was part of the team who developed Icewind Dale: Heart of Winter published by Interplay Productions for PC. Most recently, John Deiley was involved in the development of Icewind Dale: Trials of the Luremaster.