The Halo franchise certainly isn't losing any appeal, after crossing a new milestone.
Microsoft's sci-fi shooter series, which debuted in 2001 with Halo: Combat Evolved, has sold more than 65 million units worldwide.
The next core entry in the Halo series, Halo 5: Guardians, is on track to launch on October 27 for Xbox One.
Its recently-revealed Warzone multiplayer mode features 24 players and maps up to four times the size of those seen in past Halo games.
Developer 343 Industries said in June that after Halo: The Master Chief Collection, no Halo game will launch without a beta.
Our review of Halo: The Master Chief Collection (Xbox One): A bar-raising compilation
