This stems from a friendly office discussion.
To make it as fair as possible for both teams, each team should have equal ability to score first.
So I would suggest the offenses starting on the 30 yard line (going in). Any turnover is a dead ball, and they come off the field. Field goals or touchdowns are fine.
Twist: BOTH offenses and defenses are on the field at the same time, on opposite 30s. First team in the end zone wins. If one team kicks a field goal, the other team gets to keep playing until either turnover on downs, touchdown, turnover or they kick a field goal to go into the next round.
To make it as fair as possible for both teams, each team should have equal ability to score first.
So I would suggest the offenses starting on the 30 yard line (going in). Any turnover is a dead ball, and they come off the field. Field goals or touchdowns are fine.
Twist: BOTH offenses and defenses are on the field at the same time, on opposite 30s. First team in the end zone wins. If one team kicks a field goal, the other team gets to keep playing until either turnover on downs, touchdown, turnover or they kick a field goal to go into the next round.