no official mobile APK version

There is for South Park: The Stick of Truth

The APK Advantage:

South Park: The Stick of Truth is not officially available as an Android application (APK). While third-party sites may claim to host an APK, the game was only released for PlayStation 3/4 Xbox 360/One Nintendo Switch

South Park: The Stick of Truth is a role-playing video game developed by Obsidian Entertainment and published by Ubisoft. The game is based on the popular adult animated television series South Park, created by Trey Parker and Matt Stone. The game follows the story of the New Kid, a young boy who moves to the town of South Park, Colorado, and becomes embroiled in a battle between humans and the supernatural.

"The Quest for Truth in a World of Deceit"

A small niche of developers has attempted to port the game using unofficial Windows emulators (like Winlator or Mobox). This is not an "APK install" but rather running the full PC .exe file inside an emulator on your phone.

fake or malicious files

While you might see sites claiming to offer a "South Park: The Stick of Truth APK," these are almost certainly . The only official South Park game currently designed for mobile is South Park: Phone Destroyer , a card-based battle game quite different from the turn-based RPG mechanics of The Stick of Truth . How People Are Playing It on Android