The lights are on
Through the first five days Microsoft says 1.1 million players have completed Halo 4's campaign.
However, only 6 percent of total players completed the campaign on Legendary in the first five days. Additionally, four million people played Halo 4 on Xbox Live. A full breakdown of all the Halo 4 stats can been seen on Halo Waypoint here.
We don't know how many units of Halo 4 have been sold so far. Microsoft said earlier this week the game generated $220 million worldwide in the first 24 hours.