After watching this Documentary/Movie ,I can't help thinking that there is some truth to this ; if you look at the context of the mission you would agree that due to the sensitive nature of 'alien ' life form right on our doorstep ,the truth has to be deliberately warped a little in order to preserve the truth. Therefore it is not surprising that the Soviets and Americans would unite together in a conflict between Alien and Human . Surely the Alien life form is protecting its territory , and so the fact that the moon was never visited again by humans makes sense .
It may be fiction but then again our lives and security is dependent on this Apollo 18 being Fiction . This combined with unexplained phenomena in our Earth space orbit really points to the fact that there IS a cover-up by the USA and the Soviets , in order , to protect humans.
One has to have an open mind , put facts together and come up with our own decisions and not be cohearsed at all , for the simple reason that this kind of reality is simply unbelievable.