As an American football game, Pro Football is very basic in its gameplay. Like in American football, there are two teams, one controlled by the player (represented as π) and one controlled by the computer (represented as *), who must score points by carrying a football to the other team's side of the stadium without being intercepted on the way there, resulting in a touchdown. Only one team, the offense, can do this at a time, while the other team, the defense, must intercept to take the ball and become the offense instead. When playing offense, the player must use the right button to run forward and the 2nd button to pass to another player until reaching the other side of the screen. When playing defense, the player must repeatedly tap Enter to intercept the opponent as it runs forward, which becomes harder to do each time it happens.
Each touchdown is worth six points. Additionally, the player has the option to kick the football into the opponent's goal post after each touchdown, resulting in a field goal which results in an additional point if the football goes through. Whether it does is determined randomly by where the θ symbol is depicted; if it is inside the boundaries of the goal post, a point will be earned.
The opening sequence.
The two different teams.
The score screen, where the player has 19 points and the computer has 12 points.
The player controlling the offense.
The player controlling the defense.
A kick that will result in a field goal.
A kick that will not result in a field goal.
This game takes up a significant amount of memory on a calculator during gameplay, and it will often crash after a certain score due to memory overloads.