I for one don't really like murder in general but if someone makes a game where it gives you the option to do it, then that's fine, its all up to the consumer of the product, if you want to kill kids in a video game, then that's fine, if killing kids is unethical then why is it okay for the thousands of games and movies that come out every year that are centered about killing military/civilians/police/etc, doesn't matter what you kill, its still killing regardless.