Hello, prospective Commanders. I have a Steam key for XCOM: EU that I have been sitting on since preordering Bioshock Infinite on GMG. Since it's not a Steam gift, it's basically useless for trading, and since everyone I know already has it or doesn't want it, I figured I'd try to find someone who might actually play it. But I can't just give it to anyone. You have to demonstrate your strategic prowess to me.
If you are interested in winning the key, post your Steam profile and a proposal for an effective defense strategy against a fleet of alien spaceships hellbent on wiping out humanity. Assume you have the full resources of mankind at your disposal but only a matter of weeks to prepare.