Red Dead Redemption 2 is a vast game. Rockstar Games' western gives around 100 story missions and a lot of additional content. To look through all of it you'll need a lot of time. However speedrunners are interested in finishing the game as quick as possible and the new world record was set not a long time ago. Speedrunner Hess finished the game in 12 hours and 59 minutes. You could check his walkthrough on Twitch.
Previous record was set by Demomute from UK. He finished the game in 13 hours 22 minutes and 46 seconds. Let us know what's your walkthrough time in RDR 2 in the comments below!