The Mutant Factor is a 2 map (soon to be 3) singleplayer campaign set in a universe similar to the Crysis universe but with notable exceptions. There are several new characters and enemies that Nomad will have to face as well as new abilities for the player to utilize. This started as a simple map for Crysis and became something more as I created new characters and additional abilities. In my opinion, at that point, it became a mod.
Enjoy The Mutant Factor and many other great mods on Desura.