System Link
From Halopedia, the Halo wiki
Template:Realworld Xbox Halo: Combat Evolved and Halo 2 multiplayer allows you to play up to 4 players. With system link you can play with up to 8 players on multiplayer by connecting 2 xboxes together with the system link cable. You can also connect up to 4 Xboxes with the system link cable and play up to 16+ players. This option is on the title of screen of Halo: Combat Evolved, Halo 2 and Halo 3 and most other Xbox games with this feature.
Keeping the tradition, the Xbox 360 also allows you to play system link.
It appears more developers are utilizing the feature in this generation of video game consoles. At the time of this article there are a total of 11 system link enabled games out of 41. This means a whopping 26% of the entire library supports the feature, and this is only the beginning!
As more 360 games are released and people start to buy second consoles, it’s becoming difficult for the average gamer to find out what games support system link.