Things You'll Need
Instructions
Set up the PlayStation 3s and televisions adjacent to one another. Every television needs to be set up with a PlayStation 3 connected to it and a copy of the game in the console.
Connect the PS3s together with the four-port LAN adapter. An LAN cable will connect all of the PS3s onto one network. Use the Ethernet ports on the back of the PS3s to make this connection. A four-port has four access points, meaning that you can network up to four consoles. If you require more, you will need a cable with additional ports.
Disconnect the PS3s from the Internet and select an LAN game mode on all consoles. When you enter into "Zombie" mode with the consoles networked together, you can use the game's LAN settings to place all the PS3s into one local game. You are still stuck with two players per television, but you can add an extra two for each connected PS3. If you don't disconnect from the Internet before attempting this, you will be taken to the PlayStation Network lobby and will be unable to play an LAN game.