Walden, a game is a first-person open-world video game developed by Tracy Fullerton and the USC Game Innovation Lab for Microsoft Windows, Mac OS X, PlayStation 4, and Xbox One. Released on itch.io on July 4, 2017, for PC/Mac, on PlayStation 4 on May 15, 2018, and on Xbox One on July 2, 2021, the game translates the experience of naturalist and author Henry David Thoreau's stay at Walden Pond in 1845–47 to a video game. The game was announced for PlayStation 4 at the 2017 PlayStation Experience.