
Borderlands 4 hasn't done terribly for itself—some terrible UI design choices and stuttery framerates weren't enough to stop it from landing a solid critical reception (including from yours truly in my Borderlands 4 review). That's been reflected in the sales it's gathered in the US.
Per analyst firm Circana (via Gamesindustry.biz), Borderlands 4 has Gearbox counting stacks for the foreseeable future: It was the number one US best-seller for the month of September (August 31 to October 3, to be specific). Not just that, but it's sold 30% more than Borderlands 3's debut, and stands as the fastest-selling game in the franchise's history.