Since these IPAs are not on the App Store, they must be "sideloaded" using tools like AltStore or Sideloadly.

These ports are fan-made. Common bugs include broken inventory buttons or lack of native controller support, though some workarounds involve using specific in-game button sequences to navigate menus. Alternative: Emulation & Streaming

To put together a "paper" or guide on obtaining and installing a Hollow Knight IPA

One of the factors contributing to Hollow Knight's popularity among gamers and developers alike is its open-source nature. The game's source code is available on GitHub, which has led to the creation of various mods, tweaks, and even unofficial ports to other platforms. For iOS enthusiasts, one of the most sought-after requests has been to play Hollow Knight on their devices. This led to the development of Hollow Knight IPA, a version of the game tailored for iOS devices.