Editing Terrance Mephesto (section)

===Death===
During the central storyline of "[[South Park: The Fractured But Whole]]", the player is tasked to visit the South Park Genetic Engineering Ranch to uncover the villains' efforts to genetically alter his cats and henchmen. The level "The Many Asses of Dr. Mephesto", styled on a classic dungeon crawl, portrays the location radically different from the series, featuring it as a sprawling science facility with a wide, bustling variety of scientists, employed by 'Mephesto's Tech', with the interior visually resembling the Visitor's Center from the 1993 film ''Jurassic Park'', with Dr. Mephesto playing a role as a tour guide, while his assistant Kevin is absent and never mentioned, though he retains his penchant for multi-assed animals.

During the tour, on the third floor of the facility, Mephesto displays "genetic mutations of [his] dead son" to display his hopes that his skills could one day help humans, lamenting that Terrance was "killed tragically when some children in town were playing with a relic belonging to [[Barbra Streisand]]", seeming to suggest the character died twenty years earlier during the events of "[[Meha-Streisand (episode)|Mecha-Streisand]]", much to the boys' surprise. When [[Call Girl]] asks if the facility is his way of trying to bring back his dead son, Mephesto denies this and suggests Terrance needs "more asses" to rest in peace. Some of these mutations later appear in the background of the level while the player is tasked with turning off the power. 

The sequence conflicted with established canon in several ways, as Mephesto's ranch had previously appeared to be a relatively modest family operation without outside involvement, and was never portrayed as the sprawling facility seen in the game, with Kevin accompanying Mephesto in all of his major appearances, and in addition, Terrance has made background appearances throughout the series from his debut episode well into the twentieth season, during the game's production and well after the events of "Mecha-Streisand". These appearances continued even after the game's release, as he attends an assembly in "[[Sons a Witches]]", which aired in October 2017.

Released one month later, the game "[[South Park: Phone Destroyer]]", also published by Ubisoft, features Mephesto in the more familiar version of his ranch seen in previous episodes, alongside both Kevin and Terrance during the character creation process, and Terrance also appears in gameplay as mentioned above, with new dialogue. The character's status is therefore considered 'alive' and this sequence in considered non-canon to the television series.