Demian's Gamebook Web Page

Person - Costello, Matthew J.

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Items with "Costello, Matthew J." as Author

Call of Cthulhu

Alone Against the Dark

Crossroads Adventures

3. Robert Silverberg's Majipoor: Revolt on Majipoor
14. Robert Heinlein's Glory Road: Fate's Trick

DC Heroes

Hex: Escort to Hell
Wheel of Destruction

Fantasy Gamer

The Thing in the Darkness

GAMES

Escape from Horror Island
The Paradox Labyrinth

Marvel Super Heroes Adventure Gamebooks (American)

8. Daredevil: Guilt by Association

Proteus Books Novels

The 7th Guest

Role Aids

Final Challenge

Sniper! Adventure Gamebooks

4. KGB Doublecross