Yes, it's possible to play the game solo, but you're a dope if you do. Aside from a few puzzle spots that need two cooperating balls, it's just sheer fun trading bants over VOIP as you zip around as the most energetic countryballs ever. Once again, the map is entirely open, there are no tethers, and voice communication allows not only coordination, but also blessed moments of listening to your friends getting into trouble of screen - or failing to identify Scandinavian flags. This is a core part of the experience and you're missing out if you're going at it alone.
