Borderlands 3 is an action role-playing first-person shooter video game developed by Gearbox Software and published by 2K Games. It is the sequel to 2012's Borderlands 2, and the fourth main entry in the Borderlands series. Borderlands 3 was released on 13 September 2019 for Microsoft Windows, PlayStation 4, Xbox One and on 30 October 2019 for Apple macOS. A Stadia port was released on December 17,2019.

Players complete quests and side missions, in single-player or multiplayer, as one of four classes. When killed, enemies may drop weapons and gear which can be equipped. New abilities are unlocked as the player gains experience. Unlike previous games, the levels of Borderlands 3 take place on multiple planets. The plot is centered around stopping the cult-leading twins, Troy and Tyreen Calypso, from harnessing the power of the alien Vaults spread across the galaxy.

Upon release, Borderlands 3 received generally favorable reviews, though some criticized the lack of innovation and technical issues. Initial sales of the game were highest among the Borderlands series, shipping more than five million copies in five days.