An out-of-print espionage roleplaying game published by TSR, Inc. (now Wizards of the Coast). Top Secret exists in two non-compatible versions: the original authored by Merle Rasmussen, and its simpler replacement, Top Secret/S.I..
Top Secret/S.I. site describing a series of adventures and alternative universes, including profiles of players, characters, NPCs, and vehicles. Also featuring weekly news and links about Top Secret.
Playable, interactive Top Secret/S.I. missions and training scenarios, including Blackhawk chopper training, and a Pepperdine University mission.
Group of interlinking sites forming "Top Secret\SI Webring".
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