Red Dead Redemption 2 is the continuation of the Red Dead game series created by Rockstar Gaming and released in 2018.
In the first Red Dead you played as John Marston from the Van der Linde gang, but in Red Dead 2 you play as Arthur Morgan, who is also from the same gang.
John Marston 
Arthur Morgan
Playing as Arthur you have to try and survive with the Van der Linde gang during the decline of the Wild West while also having to deal with government forces, rival gangs, and much more. The world of Red Dead 2 is an open world so you can go and explore and do anything you want all while waiting till the last minute to continue on with the main storyline. Just remember that certain moments in the game can affect the game world later on.
Red Dead 2 also introduces Red Dead Online where you get to play with your friends and explore the world. Online you get to make your own character and can create gangs with others to do heists, hunting, shootouts, or whatever you want to do as a cowboy growing up. And don’t lie, we all wanted to be cowboys in the Wild West growing up. Just be careful, what you do online can make your character into an outlaw or a bounty hunter/sheriff. There is also a story play through you can do online as well if that is more your speed. Rockstar is also still creating content and updating the online part of Red Dead 2, so there is much more to come.
You can get Red Dead 2 for PlayStation 4, Xbox One. The PC version is scheduled to be released November 2019.