Assassin’s Creed IV ties certain game logic to framerate. If you unlock the FPS (to 144 or 165) using the Tweaker, you will notice immediate glitches: ships cutting ropes faster, unskippable tailing missions finishing early, or Edward diving off the ship when you meant to walk. We will address the "safe FPS" limits later.
The existence of the AC4 Tweaker highlights a recurring theme in PC gaming: the reliance on community patches for long-term preservation. ac4 tweaker
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Uninstallation: