Master Chief just keeps fighting and fighting.

The first-person shooter “Halo 3,” a star on DVD in 2007, was the star of the online gaming service Xbox Live into 2008 as well, according to Live programming director Larry Hryb in an announcement on his blog.

The game highlighting the skills and military acumen of a heavily-armed supersoldier named Master Chief outpaced such titles as “Call of Duty 4,” “Gears of War 2,” “Guitar Hero III” and “Grand Theft Auto IV.” Exactly how far ahead it led wasn’t revealed — Hryb kept the numbers to himself.

But the count is based on “UUs,” or unique users, which are defined as … uh, well, just visit the blog and see what he means.