This release of the game is a port for new platforms 13 years after the original version. It contains the base game Red Dead Redemption as well as the DLC Red Dead Redemption: Undead Nightmare, but not the multiplayer component.
In addition it has some content from Red Dead Redemption: Game of the Year Edition and support for some additional languages, but no elements are remastered. The 2024 Windows version has support for 4K resolution, ultrawide (21:9) and super ultrawide (32:9) aspect ratios, 144 Hz refresh rate, HDR lighting, adjustable draw distances and shadow quality settings.