It's been a long time since Desktop Tower Defense - the genre needs a little shaking up. And with the Prey series of shooter games under their belts, Human Head Studios thinks they're the ones to do it. Their latest game is Fort Courage, and it fits broadly into the mobile-friendly category. The free game is available right now on the Google Play Store, but you'll need an NVIDIA Tegra-powered device to run it, and a Tegra 3 for the best results.
In Fort Courage, you take the role of a young boy and
his stuffed tiger companion another young boy, defending their titular tree fort against waves of bad guys sprung from their imaginations.