Who has the largest meta-game score in Halo 3 campaign?

The player with the largest meta-game score in the Halo 3 campaign is often associated with the global leaderboards, where scores are influenced by various factors such as time, scoring, and achievements. As of my last update, specific player rankings can fluctuate frequently, so it's best to check the latest leaderboards on Halo Waypoint or similar platforms for the most current information. Generally, top players utilize optimal strategies and speedrun techniques to achieve high scores.