*credit goes to zuumbo*

VIDEO TUT: [ Register or Signin to view external links. ]

Requirements:
Lagswitch / Net Tools (PC Program)
Means of logging in a Guest Account (Extra controller / device)
1. Change Max Players to ONE player at the Zombie Menu (Player Match, Solo, Custom Match, etc.)

2. Create a Custom Game lobby of TranZit or Survival (This will determine the mode you get 8 players with) (Map choice doesn't affect the glitch)

3. Log into a secondary Account (Xboxlive / Guest Account) on a Second Controller.

4. (Turn ON Lag Switch / Net Tools) Leave Lobby.

5. An error message will come up. "Error: The selected session was full or the join operation has failed." Press A or B. Than select Custom Game and the screen should freeze / Black Screen.

6. (Turn OFF Lag Switch / Net Tools) Wait for the error message to reappear. "Error: The selected session was full or the join operation has failed." Press A or B.

7. Eventually a Lobby will be created It is optional to Logout Secondary Account / Guest.

8. Start game with 4 or less Players. If 5 or more players are in the lobby. The game WON'T START.

9. Once the Load Screen appears, Players can than join the lobby up to 8 Max.