Tiny Invaders history, as a new update offers new levels and a new addition to the story. After the President's infection at the end of the game (spoilers, sorry), a resistant human appears, according to TouchArcade. Said human, obviously, must be taken out of the picture by the titular tiny invaders.
In addition to the update, a free version of Tiny Invaders has been released by developer Hog Rocket. The free version contains 15 levels and allows users to upgrade to the full version for a mere $0.99. You can grab it from iTunes here. Just don't make the same mistake we did and download it when you should be doing something important. As is often the case with alien abductions, you just might find yourself a victim of missing time.