This specific version, v1.1.3.1, was a minor hotfix issued by Naughty Dog to refine the experience after the more substantial v1.1.3 patch. The primary focus of this update cycle included:

The Last of Us Part I on PC had a rocky launch, but by the time of the v1.1.3.x updates, the game reached a much more "Verified" state. Players using these updates generally reported significantly faster shader compilation times and fewer "out of memory" errors compared to the launch version.

When dealing with .rar files from third-party sources, it is important to keep the following in mind:

: Improvements to how the game utilizes video memory to prevent crashes on hardware with lower VRAM.

: Improving the UI and performance stability for players on Valve's handheld console.

: Most RUNE updates require a specific "base" version of the game to be installed (e.g., you usually need v1.1.3 already installed to apply v1.1.3.1).

: Addressing specific triggers for crashes that occurred during gameplay or while loading shaders.