The idea was to have the players control a zombie and make them look for civilians to infect, each infected civilian then turns in to a zombie and helps spread the infection.
I did sketches, concept art, created the concept for the base game design, blockout modeling for the demo level, also did some shader programming and lighting for the demo level.
The initial concept evolved to the infection taking place in a space ship but we did a quick demo into Unity using some premade characters, that's why you see men in suits there :D