How do I activate 1999 mode in Bioshock Infinite? By Horde 0 1.96K viewsJuly 22, 2013bioshock infinite Horde57 March 28, 2013 0 Comments I read about this before release. How do I unlock it? 0 AnswersActiveVotedNewestOldest 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 are viewing 1 out of 0 answers, click here to view all answers. You must be logged in to answer questions or comment Register or LoginCan you help other gamers by anwering questions? Read all the latest additions.