Map Downloads:

Click here to download the maps used on the IWU clan servers, press ctrl+f to find a map that you want to download.

To download Zombie Master the mod for HL2DM, follow these instructions:

Download and install: zm_beta_112_full.exe
Restart Steam
Download and install: zm_beta_112_to_113_patch.exe
Restart Steam

Zombie Master should now show in your "My Games" tab in steam. Launch it as you would any half life game. Join a server and have fun.

You can get the zombie files here