Most other "intro completed" saves I've seen have extra stuff done. In this one, literally nothing has been done aside from what the game forces you to do. No extra animal icons, no cabins discovered, etc. You spawn at Horseshoe Overlook with everything stock, weapons and all.

Installation:

1. Navigate to %USERPROFILE%\Documents\Rockstar Games\Red Dead Redemption 2\Profiles\
2. Open the folder named some hexadecimal number. Each user has their own, unique profile identifier. (E.g. 8C11E18.)
3. Back up your existing SRDR30000 (just in case).
4. Replace your SRDR30000 with the one in the archive.