Called Red Dead Redemption V, it’s a modification for GTA5 featuring the full map with additional content.
A group of modders are working bring Red Dead Redemption’s full map into Grand Theft Auto 5 on PC.
That said, due to the version of Rockstar Advanced Game Engine (RAGE) used before GTA5 was developed, Red Dead Redemption “is the toughest” game to crack, so the team asks everyone looking forward to it to “be patient.”