Well that was quick. Following a Twitter announcement yesterday, XCOM: Enemy Unknown is now available in the Google Play Store. The game will set you back $9.99.
The mobile optimized version of the game needs about 3GB of storage so before you go and purchase it, make sure you have enough space. Curiously, it lists all my devices is incompatible. I have a Samsung Galaxy Note 2 and a ASUS Transformer TF700T, yet none of those will let me play the game.
Anyways, if you have a device that's capable, go on and pick up one of the best games on the PC the past few years.