After a rough start on Microsoft’s newest console generation, Halo is back on its feet with record-breaking success following the series’ most recent launch, Halo 5: Guardians.

Since its release on October 27, 343 Industries’ shooter has become the “fastest-selling Xbox One exclusive game to-date, with more than $400 million in global sales of Halo 5: Guardians games and hardware, pushing the franchise to over $5 billion lifetime,” says Xbox. Fans have logged over 21 million hours of total gameplay with 9 million hours spread across nearly 7 million Arena and Warzone multiplayer matches. The launch itself earned a Guinness World Records title for “most watched video game launch broadcast” with more than 330,000 unique streams on the eve of release.

Our review was almost entirely positive, praising the game’s immensly improved multiplayer experience over previous titles.

Microsoft, 343 Industries, and the fans themselves aren’t the only ones celebrating Halo 5’s success. The enthusiasm surrounding Halo 5’s in-game REQ packs has lead to $500,000 more in prize pool money for the upcoming Halo World Championship later this year. That’s a 50% increase to the $1 million prize pool 343 announced earlier this year in just one week.

The Championship kicks off this December with the grand finals taking place in March 2016. 16 teams in total will participate, representing the following regions:

Infographic courtesy of Halo Waypoint.

Registration info, tournament format, and more details are to come in the coming weeks, says 343.

What’s your first week with Halo 5: Guardians been like? What part are you enjoying the most? Tell us in the comments!