Australia, France, Great Britain, Greece and Switzerland.
Olympic GamesThe olympic games is a event where all countries of their best players compete and win.
The countries that have attended all the Olympics include: Australia, Greece, France, Switzerland and Great Britain Wooo! 1st to answer
The differences are the Olympic Games are open to all 201 countries that are members of the IOC (International Olympic Committee), the Commonwealth Games are only open to countries under the British monarchy and the Asian Games are exclusive to the Asian Continent and it's countries.
Australia, France, Great Britain, Greece and Switzerland have competed in all of the Olympic games as of 2012.
The one with potebtial can compete
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not all countries competed but normally all contries are invited to take part
The importance of the Olympic games today is that it brings different cultures together. All countries are united in this athletic occasion.