How do I activate 1999 mode in Bioshock Infinite? 940 viewsJuly 22, 2013bioshock infinite Horde53 March 28, 2013 0 Comments I read about this before release. How do I unlock it? 1 AnswerActiveVotedNewestOldest 0 Anonymous Posted March 28, 2013 0 Comments You need to be on the menu then press:Up, Up, Down, Down, Left, Right, Left, Right, Esc, Enter You must be logged in to answer questions or comment Register or LoginRelated:Fallout 76 Easy Fat Man Location GuidePC Game Release Date List 2018 - 2019The Best VR GamesMetro Exodus System Requirements RevealedHow do you remap the Just Cause 4 movement keys?Can you help other gamers by anwering questions? Read all the latest additions.