Mercenaries, Spies and Private Eyes (MSPE) is a tabletop role-playing game designed and written by Michael A. Stackpole and first published in April 1983 by Blade, a division of Flying Buffalo, Inc. A second edition was later published by Sleuth Publications, but Flying Buffalo continues to distribute the game. MSPE's mechanics are based on those of Tunnels and Trolls, with the addition of a skill system for characters. A few solo adventure modules were also released for MSPE.