Uncharted: The Lost Legacy is a 2017 action-adventure game developed by Naughty Dog and published by Sony Interactive Entertainment for the PlayStation 4. It is a standalone expansion to Uncharted 4, and the first Uncharted game not to feature protagonist Nathan Drake. Players instead control treasure hunter and Nathan's old friend, former love interest and associate Chloe Frazer, who seeks the Tusk of Ganesh in the Western Ghats mountain ranges of India in the midst of a civil war, with the help of ex-mercenary Nadine Ross and Nathan's brother Samuel Drake all the while coming into conflict with Asav, a ruthless warlord and his army of insurgents.

Like other Uncharted games, Lost Legacy is played from a third-person perspective; players use firearms, and can use melee combat and stealth to defend against enemies. Players solve puzzles, incorporating several platformer elements to advance the narrative, and navigate the game world on foot or by vehicle.