Halo is only evil insofar as it encourages me to put off doing my homework until I play through the beach attack on The Silent Cartographer one more time! I’m even one of those rare people who think Halo’s story is pretty neat. I love the final cinematic of Halo 3. “We’ll make it,” has become a catchphrase of mine.
Now, my parents didn’t allow me to play Halo until I was 15, because they wanted me to be old enough to process the violence in a mature and Christian way. Some parents feel differently about it, and let their kids play Halo earlier or later. Do as your parents require, and within those constraints enjoy a wonderful game!
When you’re old enough, pick up the Mass Effect series, too. It is a lot more morally complex than Halo, because you have the option to be evil, but it is my favorite XBox game.