This makes it easier to upload/download over unstable connections and bypass file size limits on hosting sites.
Large games are often split into smaller "parts" (e.g., part1.rar, part2.rar, etc.). Lets.Sing.2019-DARKSiDERS.part1.rar
In the scene, releases follow a strict naming format: Game.Name-GROUPNAME . The File Structure: RAR and Multi-Part Archives This makes it easier to upload/download over unstable