Originally available only to season pass holders, Grounded was released on Amazon Instant Video last week. The documentary, which you can watch above, features exclusive interviews with the game's creators and the voice actors who brought the characters to life.
Grounded is intended to be watched as a "thoughtful afterword" to The Last of Us, and viewers are advised to complete the game first.
Naughty Dog released the game's first and last story-driven downloadable content, Left Behind, Feb. 14. For more on how the DLC introduced a new character and perspective on Ellie, check out our interview with creative director Neil Druckmann.