GamesRadar - It’s not long until Aliens: Colonial Marines pits you toe-to-toe against some really grumpy extraterrestrials. You should probably know what you’re up against if you're going to survive. How? Well, look at the past, and see what's worked to send the evil monstrosities straight to hell. Colonial Marines is an official entry into the Aliens canon, so we’ve assembled everything you need to know, be it from films, games, or books.