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Prey (2006) High-Framerate Fix

An experimental runtime patch that keeps Prey's original 62.5 Hz simulation while providing smoother high-refresh-rate presentation and low-latency mouse input.

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Overview

PreyHFR interpolates the camera, first-person weapon, world transforms, skeletal animation, and mouse look between the game's native simulation ticks. It is a reversible runtime injection and does not modify the retail executable, game DLL, archives, or saves.

Compatibility

This release supports the Windows Steam release of Prey 1.4 and other retail versions provided their layout matches what the patch expects. Unsupported builds fail closed.

Before installing

This is an unofficial, experimental, largely AI-generated patch. Back up your saves and expect that multiplayer, demos, overlays, ReShade, and other injectors may be incompatible. Extract the archive into the directory containing prey.exe (make sure you either download the release with the bundled loader or otherwise that you already have an available ASI Loader installed in the game's root directory (like Ultimate ASI Loader)), then start the game normally.

View latest release (v1.0.6)

Releases

Release notes and downloadable files

5 releases
v1.0.6 Latest

Release v1.0.6

install instructions:
if you are not familiar with mods, download the zip with the loader, extract the zip into the game folder, launch the game, should work by itself

loosened up hard sha validation, now the mod only checks that the hook paths are present and layout is what it expects; it should work with other retail versions provided all the expected code paths are present.

v1.0.5

Release v1.0.5

install instructions:
if you are not familiar with mods, download the zip with the loader, extract the zip into the game folder, launch the game, should work by itself

this release fixes particle effects strobing with the mod active (would appear and disappear almost every frame)

v1.0.4

Release v1.0.4
switched to an ASI plugin architecture instead of raw dll + exe; enables compatibility with other mods (potentially, as long as hooks/code don't collide between them) and starts up automatically with the game

if you are not familiar with mods, download the zip with the loader, extract the zip into the game folder, launch the game, should work by itself

fixes cold boot persistent frametime hitch/stutter too: the underlying game timer was too low resolution for high fps and would sometimes lock into a bad phase for the whole game session

v1.0.3

Release v1.0.3

fixes checkpoint frametimes hitch
there might still be a persistent frametime hitch at first mod boot, a game restart should fix it

v1.0.2

Release v1.0.2