If you are looking to play the game legitimately, it is available across multiple modern platforms:
This response uses data provided by Google's Knowledge Graph South Park™: The Stick of Truth™ for Nintendo Switch SP-TSOT-(USA)-NSwTcH-[BASE]-NSP-(eShop)-Ziperto...
: The Switch version is a direct port of the original and generally runs well, though some users have reported minor audio glitches during cutscenes when using emulation. Purchasing Options If you are looking to play the game
: Specifies this is the core game without additional DLC or updates. : Accessible via Subscription for PC streaming
: Features traditional RPG mechanics including classes (Fighter, Mage, Thief, or Jew), turn-based combat, and an open-world exploration of a condensed version of the town of South Park.
: Accessible via Subscription for PC streaming. Steam : Available for Windows PC . Google Watch Action Data
South Park™: The Stick of Truth™ for Nintendo Switch - Nintendo Official Site. January 2018 - The Entropy Pump