VIPER (acronym for "Venomous Imperial Party of the Eternal Reptile") is a hi-tech terrorist organization from Champions Online and one of the many enemy factions that cause havoc in the in-game world, having a desire to conquer the world and being willing to go to extreme lengths to do so: such as nuclear warfare or other potentially world-ending scenarios.

VIPER are under the command of the Supreme Serpent - who is one of the arch-villains of the Champions universe.

Despite being a military-based organization VIPER, like a great many comic book-inspired organizations, also dabble in black magic: this becomes a central plot in the "Serpent Lantern" adventure pack and introduces dangerous Serpent Mages to VIPER's already formidable arsenal of henchmen.