Hi, offroaders,
We have an update on the download size issue. We have localized the source in the Steam configuration for the game and removed it without a need for patching.
The download size should be always around 8 GB now and should allow everyone to proceed with installing without any issues.
If you find any further issues with the download, please inform us in the dedicated thread here on Steam or via Discord: https://steamcommunity.com/app/2260130/discussions/0/6142387869102560217/
Thank you for your patience and enjoy the prologue to its fullest!
Remember that you can ask us anything on Discord:
https://store.steampowered.com/app/1387500/Offroad_Mechanic_Simulator/