Zombie Master is an HL2 Mod that has ceased further development but is still a very good Zombie Mod for anyone who loves objective based zombie games or scaring the crap out of other players. It is a FPS from the perspective of the survivors and sort of an RTS experience from the view of the Zombie Master. The players are usually set with map-specific objectives, which can range from gathering a range of items required to escape or unlocking different parts of the map, but each player-created map has its own unique objectives and may take a while to learn. Each round, one player is chosen from the pool of players on the server to play as the zombie master and as the remaining survivors traverse the map, the zombie master may set traps or summon zombies to prevent the survivors from reaching their objectives. After playing with Jailia and Hidden-sight last night, i realized how much fun it would be to have more guild members playing, as this game really shines when you have a large group of survivors working towards their common goal of survival.
Plus i think Necro would love playing as zombie master...
I believe the mod is only downloadable from the ZM main site:
Zombie Master - News
Anyone interested in playing can also friend me on steam... im in the AI and MOFO steam groups and my SteamID is: Hatsuna|lazyasian224