So I'm trying to install a little game called Xcom: Enemy Within, Google Play store downloads most of the App- I'd say 99% at least...then it gives me an error and says there's not enough memory- I have about 338 MB left after that.

MORESO- I have an external mini SD card that I want to put this on but it won't allow me to download directly to it.(Which- I must say is a dumb design oversight that...well the ability to do that has been around since Windows XP guys come on) so long-term it isn't going to be that big of an issue. What can I do?