The Great Bicycle Mystery is a 15 level megawad for cooperative Doom II play for 2-4 people. It includes many new textures, new music, and a new enemy that replaces the Nazi. All levels were designed to be linear, good looking, and easy to just start playing with a group of strangers or friends. You can expect to die to multiple times in the levels, which is intended. All levels were tested by 2 players over a LAN connection. To play these levels properly, you will NEED the following things enabled:
Nick Baker - For Doom episode 5 textures (http://www.haunt.8m.com/textures.html)
New from scratch
Doom Builder, XWE, and WADMerge
None? There are a few unused textures in the wad, though.