I am always on the lookout for a good alien invasion rpg. There is currently a FATE-based one on Kickstarter. It covers an alien invasion scenario, although it is a little unorthodox. The game is called North Wars - The Martian Conquest. The game is loosely based on the movie Santa Claus Conquers the Martians. The artwork for the game looks insane. They will have yetis as player characters, Santa as a wizard, and an invading Martian army that looks like it could give the Justice League a run for their money.
You can pledge for a PDF for as little as $1 and you can pledge for the printed book and PDF for as little as $6 plus shipping. It is being done as pay-what-you-want so you can always add more to your pledge. Check it out for some holiday themed awesomeness.
North Wars Kickstarter