When you see the term in a game title or link, it indicates that the version supports 13 different languages . These typically include English, French, Italian, German, Spanish, Simplified Chinese, and several others, allowing players to choose their preferred interface and subtitle language.
Red Dead Redemption 2 : Understanding Version 1311.23 and Multi13 Repacks red dead redemption 2 version 131123 multi13 link
A "Repack" can bring that down to roughly , making it much faster to download. Installation and Technical Considerations When you see the term in a game
This build includes the full single-player story mode featuring Arthur Morgan and the initial version of Red Dead Online. Deciphering "MULTI13" and "Repack" and several others