Always ensure you are using the official DODI site to avoid malware found on "fake" mirror sites. Anno 1800 | Ubisoft Official Store
Official game installs are often bloated with unnecessary files, multiple language packs the user doesn't need, or uncompressed assets. A repacker (an individual or group) compresses these files significantly. They also often strip out the DRM (Digital Rights Management) systems like Denuvo or Ubisoft Connect, which can sometimes improve game performance. anno 1800 dodi repack