1. Open the Network control panel (the TCP/IP control panel on Macs)

2. Click TCP/IP, then click Properties.

3. Click the Specify an IP Address radio button.

4. Fill in the subnet mask field. It’s probably easiest to use 255.255.255.0 for this. This number must be identical on every machine.

5. Type in an IP address. Unlike the subnet mask, this must be different for each machine. It’s easiest to use numbers in the 192.0.0.* range (where * is a number between 1 and 255). For example, if you have four machines on your LAN you would give them the following addresses:

192.0.0.1
192.0.0.2
192.0.0.3
192.0.0.4

Remember: each IP address must be different, but the subnet mask must be the same.

6. Once this is done, reboot each machine, launch Myth, and click the Multiplayer Game button. Fill out the Player Name and Team Name fields, and choose your colors and Player Icon. At the Multiplayer Game Setup dialog, click the “Other” box. Beneath it, highlight the “TCP/IP (Internet)” option and click the OK button.

You will now see a screen that allows you to create or join TCP/IP games. On the left side is a list of games available for you to join; double-click a game name to join it. If you’d like to create your own game, fill out the following fields on the right side: