Game File: 

outbreak.zip

I felt there weren't enough games with zombies in them so I made a Wolfenstein 3D level that only uses zombies.

I'm actually quite proud of this one. I think the design is quite good and there is a little story going on but it may be hard to tell. There is a very elaborate secret area.

There are multiple difficulty levels, so try the first one if it's proving to be too hard.