Collectors use repacks to keep "complete editions" of games (including all DLCs) in a compact format for long-term storage.
PSA : How to install a repack on your SteamDeck running SteamOS Steam-Repacks
"Steam Repacks" are compressed versions of PC games originally distributed on the Steam platform. They are primarily created by third-party individuals or groups to reduce the initial download size, making games more accessible for users with slow internet or limited storage. What is a Steam Repack? Collectors use repacks to keep "complete editions" of
Most repacked games cannot access official Steam servers for multiplayer unless they use specific "online fixes" that simulate a legitimate connection. What is a Steam Repack
Users often look for repacks to fit more games onto smaller SSDs or SD cards. Risks and Safety
Users with data caps or slow speeds download a smaller package to save time and data.