VIPER is a 1993 role-playing supplement for Champions published by Hero Games/Iron Crown Enterprises.
VIPER is a supplement in which the VIPER organization is detailed. [1]
Sean Holland reviewed VIPER in White Wolf #37 (July/Aug., 1993), rating it a 4 out of 5 and stated that "If you are a Champions games master, get this book! It is the best overview of a global criminal agency yet published. Even if you don't use VIPER in your campaign, the material can be easily adapted to other villainous agencies. If you are a game master of another superhero system, I recommend that you take a close look at the VIPER sourcebook for the reasons mentioned above. This is the sourcebook for a villainous agency in a superheroic world. Don't let the boss in green down." [1]
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