Google Groups user ZenChi has notified us about his latest Google Maps API project; The popular board game RISK on Google Maps! While Zen develops a human multi-player option in his next version, you can play a hot-seat game right now with others. Here are his instructions:
You can actually play a "hot-seat" game. So everyone needs to be
huddled around one computer. Once you select a game type it
auto-generates a map (when testing I usually just do the minimal game
for simplicity) and you click on markers to add reinforcements, attack
territories from the infowindows of the nation markers. The two buttons
in the middle (the rook and the fast forward button) are for fortifying
your nations after attacking and ending the turn.
Check out other cool Google Maps based games here.