Even though a good 1st person, the game does have a few bad points
Perhaps the game could have done better if the whole alein-mutation-feature was added a little BEFORE you got used to being a human. But being a alien thing and slashing up other alein zombie things and those stupid soilder guy to busy trying to kill you while there's all these freaky things everywere.
Charater designs could have been better, but I highly suggest trying this game, before yo buy it. and its worth it. really