From within the heart of the insidious organization VIPER, a new evil has arisen... one that wishes to conquer both VIPER and Earth! Can your heroes survive the challenges to come and save humanity from the clutches of King Cobra and his minions of COIL?

In Showdown At Snake Gulch, the heroes receive word that all is not as it seems at a tourist attraction in New Mexico. Investigation uncovers a VIPER Nest where a fiendish plot has been put in place to cripple VIPER and launch a scheme of world conquest.

Uses characters from Champions Universe and Conquerors, Killers, And Crooks. The VIPER sourcebook is helpful, but not necessary.