Disclaimer: I don't know a lot about how Amazon Underground works. I only know that in order to get the game on your device, you have to download and install the Amazon Underground app (instructions here), then locate and install Legna Tactica, through the Underground App.
There's also a link here to the game itself, if it helps:
http://www.amazon.com/gp/mas/dl/android ... .amazonBee
Amazon Underground may not be available in countries other than the US. I don't know, and I don't know how to find that out.
