Cannot play offline, even though it is 100% single-player, an internet connection is REQUIRED so that they can get that sweet ad revenue. The game is fun, but the ads are overwhelming. A round is never more than a minute, and you get an ad after every round - win or lose. I did not bother to time it, but it FEELS like a 50/50 split between gameplay and ads. If you lose a round in 10 seconds, you still get an ad. I would buy this game, but I see other reviews saying you still get ads.