This game was played solely as a Play-by-Mail (PBM) game, where participants took turns by postal mail and, later, received their turn results. Some PBM games had no published components; others offered a published player's manual or introductory setting guide, etc. Salient details may be noted here in the description - especially for games with no published component.
Special Agent is a human moderated computer assisted play by mail game. Players submit up to 3 pages of written plans and contingencies every turn. All moves are responded to accurately and personally.