Campaign scoring
From Halopedia, the Halo wiki
Meta-Games are included in the campaign for Halo 3. They are confirmed as a way to collect achievements. The Meta-Game is a Halo 3 campaign mode, where by playing well, you recieve points. Having skulls activated increases the amount of points that you gain, as well as accuracy and kill count. It is unknown how this mode will differ from the campaign mode.
