Simplify the following text for a Grade 6 native English-speaking person.
Original: It was first sold in stores in North America on May 15 , 2006 , and was later sold in stores in Japan on May 25 , 2006 , in Australia on June 8 , 2006 , and in Europe on June 30 , 2006 .
Simplified: The game was released in North America and Japan in May 2006 and in Australia and Europe in June 2006 .