Rugby league is a fast, tough team sport played with an oval ball. Two teams of 13 players try to score 'tries' by carrying the ball over the other team's line. There is lots of running, passing and tackling - but no kicking the ball to score (most of the time). It is a bit like rugby union, but with simpler rules.
PNG's national team is called the Kumuls, which means 'bird of paradise' in Tok Pisin. They play in red, black and yellow shirts - the colours of the country's flag. The team has played other rugby league nations like Australia, New Zealand, England and Fiji, and has its own loyal fans who travel to home matches in their thousands.
Children play rugby league all over PNG. In coastal villages they play on sandy beaches; in the Highlands on patches of grass; in towns on proper fields. Many kids dream of growing up to be a Kumul. The PNG Hunters, a club team, plays in an Australian rugby league competition - meaning local kids see PNG players on TV every week.
Rugby league is more than just a sport in PNG. It is something almost everyone in the country watches together. When the Kumuls win a big match, towns light bonfires, drums are played, and people sing through the streets late into the night. It is one of the things that makes the whole country feel like one team.