The Gamma Cannon is an Event Decoration that was first available during the Gamma Attack! event. Build Time: Instant Size: 2 x 2 (4) plots RequirementsEdit Gamma Attack! Event Edit Complete Step Right Up, Pt. 2 World War Hulk Event Edit 300 Hulk Masks Retrieved from "https://avengers-academy.fandom.com/wiki/Gamma_Cannon?oldid=50509" Categories: Decorations Event Decorations Gamma Attack! Event Arctic Armor Pepper Event World War Hulk Event Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.