… "Valve removes arbitration from its Steam agreements — here's what that means for you" . Polygon . Retrieved September 27, 2024 . Further reading edit Bowman, Mitch May 22, 2014 . "The hidden world of Steam trading" . Polygon . …
… "Valve announces Source 2 engine, free for developers" . Polygon . Archived from the original on March 5, 2015 . Retrieved March 3, 2015 . ^ "Full Steam ahead: The History of Valve" . gamesradar . …
… Polygon . Archived from the original on July 16, 2021 . Retrieved July 15, 2021 . ^ a b Geblick, Jordan September 22, 2021 . "Valve answers all your burning Steam Deck questions in new FAQ" . …
… Polygon . …