Natural Doctrine takes the concept of natural selection and throws it in your face; the world is brutal, cold and unyielding, and you’re going to have a hard time surviving in it. The story is nothing more than an excuse to go out and kill stuff, and the gameplay is just as unforgiving as humanity’s struggle for survival in a world where other races and species are vying for dominance. Natural Doctrine tries to challenge even the most elite tactical RPG veterans, but it ends up being infuriatingly unfair - filling its 40-hour campaign with rage-inducing battles.