Extract the v2.5.2 folder and copy it into your PhysX engine directory, typically located at: C:\Program Files (x86)\NVIDIA Corporation\PhysX\Engine\ .
Type regedit and press Enter.
Even if you do not have an NVIDIA graphics card (AMD users, this applies to you too), you still need these drivers for the game to launch. ageia physx sdk not installed infernal
The basement lights went out. The monitor followed a second later. In the absolute dark, Elias felt something cold and splintered brush against his ankle. It rolled, bounced, and clinked—like a nail—against the far wall.
The crate didn't just explode. It shattered . Extract the v2
Elias was a haunt of abandonware forums, a digital archaeologist of broken things. But this error was a ghost he couldn’t trap. Ageia. The name sounded like a forgotten goddess, or a pharmaceutical company that went bankrupt after causing birth defects. He remembered, dimly, a time when PC gaming was a war of proprietary physics cards—Ageia PhysX PPUs, chunky add-on boards that promised exploding barrels with realistic splinters. The war ended when NVIDIA bought them out and killed the hardware. The SDK—Software Development Kit—was the ghost in the machine, a driver for a dead revolution.
: Extract the v2.5.2 folder from the download and paste it directly into the Engine folder mentioned above. The basement lights went out
: Some users report success by running the specific PhysX_6.10.05_SystemSoftware.exe found directly within the game's installation folder (e.g., SteamApps/common/Infernal/ ).
If you are a purist:
Infernal was coded to look for the old Ageia PhysX drivers specifically. It does not recognize the newer "NVIDIA PhysX" drivers out of the box. When the game checks your system and sees no "Ageia" folder or services, it throws the error: "Ageia PhysX SDK not installed."
You need to install the final standalone Ageia PhysX driver from before the NVIDIA merger. This driver installs the specific .dll files and registry keys that Infernal expects.