RoboCupSoccer

Soccer
  http://wiki.robocup.org/Main_Page#RoboCup_Soccer
The main focus of the RoboCup competitions is the game of football/soccer, where the research goals concern cooperative multi-robot and multi-agent systems in dynamic adversarial environments. All robots in this league are fully autonomous. 

The games also serve as a great opportunity to educate and entertain the public around S&T issues.