However, it had the weakest opening sales of any mainline Halo title in the UK and Japan. The game grossed more than $400 million in its opening week, surpassing Halo 4's record of $300 million. Exclusive to the Xbox One, the game was released on October 27, 2015. Originally alluded to in a teaser trailer shown at Microsoft's E3 Media Briefing on June 10, 2013, Halo 5: Guardians was officially announced on May 16, 2014, and the first major coverage of the game was unveiled at E3 2014, with the announcement of a multiplayer beta, set to debut via the then-upcoming Halo: The Master Chief Collection. The second game in the Reclaimer Saga, Guardians is set a year after Halo 4, and follows Fireteam Osiris, who are tasked with hunting the Master Chief and Blue Team, who have gone AWOL in search of Cortana, following her presumed demise. Halo 5: Guardians is the ninth installment in the Halo franchise. ' The quest of the hunter and the hunted has begun.' - Official summary ESRB: Teen (T) for Blood, Mild Language, and Violence

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