I agree with proxymoron, definitely need Alien Crossfire to make this a 6-star game! I lent my copy of Alien Crossfire to a friend and never saw it again and haven't seen another copy available since then.
This game would be 5 stars if it came with the 15th and final "Bonus Mission": Class Of Spook 'Em High. Unfortunately, it was only available in a patch for the UK version so many of us never got to play it.
