Works Online and Singleplayer. It's a remake of the Black Ops level "Five", however it has its own gameplay recipe of Zwonder's gameplay mixed with it.
Suggestions are extremely welcome, everything is considered.
Download below for the full multiplayer captable editon of Zwonder 2. Note that it is not the Zwonder 2 Campaign you have played in the past, its something different.
Multiplayer: "sbox_allownpcs 1" and "Sbox maxnpcs 40" add both in the server's console. Restart the server if does not work the first time (It should.)