When a game like Jurassic World Evolution 2 is downloaded in parts (Part 1, Part 2, etc.), the computer treats them as a single continuous archive.
You could be looking for text instructions or "read me" documentation on how to combine multiple parts of a game download . jurassic-world-evolution-2-part2-rar
You might be looking for the password required to extract the contents of that specific RAR file. When a game like Jurassic World Evolution 2