I don't know, however, if u got the update, turn off the snooper, it will increase the likelihood of an invasion. U know why? it will monitor your technical systems, exposing your system's weaknesses and sell them to the highest bidder.
I don't think so coz I've been playing it for quite a few months now and nothing so far but if anda make a dome of tnt (or somethin' like that) you'll crash the game and you'll need to buy a new computer. I think
