Taken from the rules included with the game: There are three main types of cards in the game: run, pass, and catch. You can play run cards anytime. Pass and Catch cards can only be played together - and only if their yardage matches exactly. The game lasts four quarters. Each quarter is one time through the deck. A typical game last about 30 minutes. Players score touchdowns by advancing exactly 100 yards through Run, Pass, and Catch cards (you can't play a 20-yard Run card if you are on the 10-yard line). Each touchdown is worth seven points.