Terror Mask (also known as Hell Mask) is a character from the Namco game, Splatterhouse, released on arcade cabinets and later on other platforms. It also appears in SHOOTERHOUSE, created by SILLYSLARDY.JPG.
The mask is a Mayan artifact that transformed parapsychology student Rick Taylor into a superhuman monster, causing Rick to rampage across West Mansion. After Hank escapes the burning mansion, the Terror Mask attempts to kill Rick by reviving a beast called "Hell Chaos". After Rick defeats the monster, the Terror Mask shattered, only to repair itself after the credits.
After an unknown amount of time, the mask returns to West Mansion with the task of "Return to West Mansion! And destroy the evil finally!".