: Indicates this is a multi-part RAR archive that contains a ZIP file inside once fully reassembled. How to Extract and Combine
: Suggests the English ("ENG") version or translation, release 1.3b. Illborne_ENGr1.3b.zip.part1.rar
: Likely refers to the specific content, potentially related to "Bloodborne" mods (e.g., "Illborne" project) or an Unreal Engine-based mod project. : Indicates this is a multi-part RAR archive