For those who want to play as zombie John, complete any mission or get everything at once, There are two saves in the archive, one at 100%, the other before John's death, The save was made on the latest version of the game and everything was completed.

Completed the entire plot
Obtained all the horses of the apocalypse
Absolutely all settlements were saved
John died and became a zombie
Absolutely everything was bought
If pirated, then here: C: \ Users \ Username \ AppData \ Roaming \. 1911 \ Red Dead Redemption \ profile

If licensed, then here: C: \ Users \ Username \ Documents \ Rockstar Games \ Red Dead Redemption \ Profiles \ profile ID

Author: Solmak