PS4’s ambitious God of War reboot has been a huge critical success, and it’s likewise turning out to be a commercial one too. Despite its brief time on the market, Sony has revealed that God of War has already hit a major sales milestone.

In a post on PlayStation Blog, Sony announced that God of War managed to sell 3.1 million copies worldwide in its first three days of availability. That makes it not only PS4’s fastest-selling exclusive game, but also the fast-selling title in the series’ history in the UK.

Shannon Studstill, the head of developer Sony Santa Monica, shared a personal message with fans on achieving the milestone. “I would like to personally thank the millions of fans around the world who decided to embark on Kratos’ latest adventure with us,” Studstill said. “We look forward to hearing more about how fans are creating new memories of their favorite God of War gameplay moments that will be remembered for a long time.”

Unlike previous installments in the series, PS4’s God of War focuses on the story of Kratos and his son, Atreus. It also eschews the series’ usual Greek mythological trappings for Norse ones and makes some radical changes to the combat system, most notably trading Kratos’s Blades of Chaos for the new Leviathan Axe.

God of War launched on April 20 and was met with widespread critical acclaim. GameSpot awarded it a 9/10 in our God of War review and said, “Everything new it does is for the better, and everything it holds onto benefits as a result. Kratos is no longer a predictable brute. God of War is no longer an old-fashioned action series. With this reboot, it confidently walks a new path that will hopefully lead to more exciting adventures to come.”