Right before the credits, videos of the real men who inspired the film are shown playing the game.
The main characters sing along with "Mmm Mmm Mmm Mmm" during the credits. When the song ends, Jeremy Renner is tagged by someone off screen. Renner curses and chases after the culprit.
Though the film opens with a caption stating it is inspired by a true story, and even closes with an image of the actual Wall Street Journal article, the credits do include the standard disclaimer about the film and its characters being fictional.