Halo 4 is a 2012 first-person shooter video game developed by 343 Industries and published by Microsoft Studios for the Xbox 360 video game console. It is the seventh video game installment in the Halo franchise. The game was released in most territories worldwide on November 6, 2012. Halo 4 '​s story begins four years after the ending of Halo 3. The player assumes the role of a cybernetically enhanced human supersoldier, Master Chief. The story is mainly set on a Forerunner planet, where Master Chief encounters the collection of alien races known as the Covenant and ancient warriors of the Forerunner empire known as the Prometheans. Master Chief is accompanied by the artificial intelligence construct Cortana.

Development of Halo 4 began in 2009 and continued until September 2012. The game was officially announced on June 6, 2011, at the 2011 Electronic Entertainment Expo (E3). The game has been supported post-launch with bug fixes, updates, and downloadable content.

Halo 4 grossed US$220 million on its launch day and $300 million in its opening week, a record for the franchise. More than one million people played Halo 4 on Xbox Live within the first 24 hours of release. As of October 25, 2014, Halo 4 has sold over 9.14 million copies. The game received generally positive reviews from professional critics on release. The game was rereleased as part of Halo: The Master Chief Collection for the Xbox One on November 11, 2014 a sequel, Halo 5: Guardians, is set to be released for the Xbox One in 2015.