The 6/55 Grand lotto was added by PCSO last April 2010 and become one of the most popular major lotto game until today. https://elliey.us/%EB%A1%9C%EB%98%90%EC%88%98%ED%95%99%EC%A0%81%EB%B6%84%EC%84%9D-%ED%99%95%EB%A5%A0%EA%B3%BC-%EB%8D%B0%EC%9D%B4%ED%84%B0%EB%A1%9C-%EC%A0%91%EA%B7%BC%ED%95%98%EB%8A%94-%EC%83%88%EB%A1%9C%EC%9A%B4/