Sometimes the repack uses a bad emulator. Replace it with a more stable one:
If the PhysX fix didn't solve 100% of the stutter, you need to tell the game's engine (Unreal Engine 3) to stop trying to predict physics frames. This is a common issue with UE3 games on modern hardware. batman arkham asylum x ray room lag repack
The Fix:
Most repacks come with the game files pre-installed. However, Arkham Asylum relies heavily on NVIDIA PhysX for particle effects (paper debris, fog, cobwebs) in the X-Ray room. Modern Windows 10/11 often ignores the old PhysX installer included in the setup. Sometimes the repack uses a bad emulator
The Fix: