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Compatibility guide

Fran Kelava edited this page Sep 10, 2026 · 12 revisions

This page lists a number of commonly encountered issues when running Fahrenheit standalone, or with other tools.

General notes

Fahrenheit only works with genuine, original Steam copies of the Final Fantasy X/X-2 HD Remaster.

We offer no support, and provide no guarantee of functionality for any other variants of this game.

Note

Fahrenheit does not check the game's version or provenance. However, it relies on the game binary's exact layout.

Thus, any modified binaries will naturally cause errors that we cannot and will not fix.

Windows systems

Do not run either the game or Fahrenheit as an administrator. This does not work and is strictly unsupported.

If you see a UAC icon (little blue shield) over your game executable:

  • Right click it and go to Properties > Compatibility.
  • Ensure Run this program as an administrator is not checked.

Linux systems

PROTON_USE_WINED3D=1 is not supported. Use DXVK instead.

Other tools

ffgriever's External File Loader for FFX/FFX-2:

  • You may encounter undefined behavior because Fahrenheit has an integrated external file loader.
    • EFL mods are trivially convertible to Fahrenheit format. We recommend that you do so and use the integrated EFL.

Untitled Project X:

  • You must patch the game executable to be large-address-aware (apply the "4GB patch").
  • If you do not, the game will run out of memory and crash on boot.

RivaTuner Statistics Server:

  • You must enable 'Use Microsoft Detours API hooking' in Setup > General > Compatibility properties.
  • If you do not, Fahrenheit's user interface will not display, making you unable to save/load and interact with mods.

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