: Since this specifies v13.0.0.1, it likely contains the content from the Free Title Update 3 , which added monsters like Chaotic Gore Magala and Risen Teostra.

In most cases, a file named like this is the first part of a "split archive" (RAR). Because modern games are very large, they are often broken into smaller chunks (part01, part02, etc.) for easier downloading or storage. What is typically inside:

Right-click the (part01) and select "Extract" using a program like WinRAR or 7-Zip. The software will automatically pull data from all the other parts to recreate the full game folder.

Download of the set (part01, part02, through the final part). Keep them all in the same folder.

You cannot "open" or use just this single file on its own. To access the content, you must:

: Large data files containing 3D models, textures, animations, and sound effects.

: The main .exe file used to launch the game.

: DLLs and configuration files required for the game to run on Windows. Important Note on Multi-part Files