In Assassin’s Creed Valhalla you become Eivor, a Viking raider raised to be a fearless warrior, and lead your clan from icy desolation in Norway to a new home amid the lush farmlands of ninth-century England. Find your settlement and conquer this hostile land by any means to earn a place in Valhalla. England in the age of the Vikings is a fractured nation of petty lords and warring kingdoms. Beneath the chaos lies a rich and untamed land waiting for a new conqueror. [1]https://www.ubisoft.com/en-gb/game/assassins-creed/valhalla
According to HowLongToBeat.com[2]https://howlongtobeat.com/game?id=77729, it takes an average of 53 hours to beat Assassin’s Creed Valhalla. This only includes the main storyline, but you can spend more than 130 hours if you are a completionist.
If you want to finish Assassin’s Creed Valhalla in as little time as possible, you can do it in 12 hours as the current speedrun record is 11h 27m 10s.[3]https://www.speedrun.com/acvalhalla