3 Player Local Co-op

The three Halo games, by default, only allow 2-Players on Co-op mode. However, in Halo: Combat Evolved and Halo 2, there are certain ways to bypass the system by modding it, allowing three players to join in. This can also be performed in Halo 3 through this glitch.

How To
Halo 3 is shipped with the ability to launch Co-op mode on Local with 2 players or on Xbox Live with 4 players on at least two Xbox 360s. However, it is possible to log a person in to the game (on Local) just before the game starts.

First of all, you will need to log in two profiles on Local, they can be either temporary profiles or gamertags signed into Xbox LIVE. Select your level and set up the game as a Normal difficulty. Get Controller 3 ready but don't login.

Next, by using Controller 1 or 2, start the game. As the timer counts down, press A on Controller 3, select Temporary Profile. Wait for the screen to fade and select Yes just as the screen goes completely black. If you select it too soon, the screen with return to the lobby and the count down will stop. If this happens, sign Player 3 out of the lobby and sign them back in, bearing the instructions in mind.

The video tutorial below will show a step-by-step walkthrough to achieve this glitch.

Note: Please bear in mind that, while performing this glitch, if you play any level that has a Cortana Message, the game will freeze since it is unable to play the message on triple split-screen. However, Gravemind messages play just fine.

Tutorial Video
YouTube Tutorial http://uk.youtube.com/watch?v=ilSH20dqI6U&e