The figure clearly tops the record held by Insomniac’s Spider-Man, which was previously the fastest-selling first-party PS4 game with 3.3 million copies sold in its first three days.
Before that, God of War held the record for selling through 3.1 million copies, in both digital and physical formats, in April 2018.
The Last of Us Part 2 had already broken the record for Sony’s fastest-selling boxed release this generation in the UK.
“We are so immensely grateful to the millions of fans around the world that have played The Last of Us Part 2 and shared their experiences with us over the last week,” creative director Neil Druckmann told the PlayStation Blog.
“We set out to tell a new kind of story, one that deals with difficult themes and would challenge you in unexpected ways. Hearing how the experience has resonated with so many of you and witnessing the type of thoughtful discussions it has sparked has been so incredible.
“We’ve also been so inspired by your creativity — whether it’s your gorgeous Photo Mode shots, jaw-dropping gameplay GIFs, or the songs you’ve recorded using Ellie’s guitar.”
He added: “The Last of Us Part 2 was made possible thanks to the efforts of the hundreds of talented and passionate developers here at Naughty Dog. We can imagine no greater honor than seeing that same passion mirrored by the people playing it. Thank you for helping us reach this amazing milestone.”
In VGC’s The Last of Us 2 review, critic Jon Bailes calls the sequel “Naughty Dog’s greatest game.”
“In every way, The Last of Us 2 is the grand culmination and skilful refinement of all the studio has done in the last decade or so,” he wrote. “Hopefully by the last of the next generation, it will have found more effective ways to communicate its themes, and more reasonable ways to bring them to fruition.”