When you encounter sites like The Pirate Bay (TPB) offering a native "PC version" of Gran Turismo 4, exercise extreme caution. These are often:

Run the game in OpenGL or Vulkan mode to ensure correct lighting and avoid the "sunflare through walls" glitch.

While torrent downloads can be convenient, there are potential risks involved, such as malware or viruses. To stay safe:

To play Gran Turismo 4 on a modern PC, you must use a PS2 emulator. 🕹️ How to Play Gran Turismo 4 on PC

: While official servers are shut down, it is possible to play online via private community servers.

Set this to 3x Native (1080p) or 6x Native (4K) depending on your hardware.

Sometimes they are just a pre-packaged version of the PCSX2 emulator with the game ISO, which may be outdated or poorly configured.