William: “Red Dead Redemption was never released on PC. Rockstar couldnt get the games engine to work, so fans were left wanting. In the years since, Rockstar has moved most of their games to PC, with varying results. These games have never been ported exceptionally, but the release of Red Dead Redemption 2 was to be different. Rockstar promised a complete release at launch, with minimal issues. It was their chance to change the narrative about their PC releases while finally bringing their incredible Western franchise to PC.”
Source: N4G PC What Happened to Red Dead Redemption 2s PC Port?