Spacefarers Guide to Alien Monsters is a 1979 role-playing game supplement published by Phoenix Games.

Contents Spacefarers Guide to Alien Monsters is a supplement which includes 350 different creatures, and many detailed animal and plant encounters for science-fiction role-playing games.

Reception William A. Barton reviewed Spacefarers Guide to Alien Monsters in The Space Gamer No. 34. Barton commented that "If [...] you don't mind the work involved - or your imagination's running a bit dry this week - Spacefarers Guide to Alien Monsters could easily prove to be a fruitful addition to your SF role-playing campaign."

Reviews Dragon #34 (Feb., 1980)

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