Being new here, and hoping this was not posted before, I'd like to post an idea I got from playing Aftermath. (Copying ideas is okay if you do it right - Silent Hill is now better than Resident Evil and it used basically the same idea) IN UFO, there was one special mission on Mars, TFTD had this mission in T'leth IIRC. Why not have some more special missions as part of the storyline, like an special Alien outpost on the moon (like their semi-main [is that a word?] headquaters there), an alien museum of human technology near T'leth where the aliens keep all those planes and ships from the Bermuda triangle and you can get vast amounts of scientific data, Area51/Dreamland being controlled by aliens [Aftermath inspired], something in Tunguska where supposedly a huge UFO crashed in 1908 - perhaps a Russian science base there , an secret base in the Arctic/Grenland built into the ice, a huge alien ship orbiting earth where you have to sneak in (guess the whack movie) and more... Obvoiusly, not all are easy as much modelling and texturing would have to be done, but an Alien moon base could look like their bases on earth just have some special rooms - like hangars for example and a special control room, the spaceship could look like the UFOs with some added content. Some ideas for the start here. What do you think?