Summer Olympic Games demand for tickets to all levels of each event, there was controversy when seats set aside for sponsors and National Delegations went unused in the early days. A system of reallocation was put in place so the empty seats were filled throughout the Games. Rio de Janeiro, Brazil hosted the 2016 Summer Olympics, becoming the third city in the Southern Hemisphere to host the Olympic Games after Melbourne, Australia, in 1956 and Sydney, Australia, in 2000, and the first South American city to host the Olympics. The preparation for these Games was overshadowed by controversies, including the instability of Brazil's
Mario & Sonic at the London 2012 Olympic Games introduces new cooperative mechanics and a Party mode. The 3DS version has 57 Olympic-based events in single-player and multiplayer. It also contains an exclusive "Story Mode" which entails the characters from Mario and Sonic's worlds working against the antagonists, who are trying to use fog machines to prevent the games from being held. The first game in the series, "Mario & Sonic at the Olympic Games", is the first official crossover title to feature characters from both Mario and Sonic the Hedgehog's respective franchises. The Olympic Games were chosen as a setting since Sega and Nintendo felt its competitive sportsmanship