The term "ahead game" implies a competition where one party has an advantage over the other. The opposite of this would be a "behind game," where one team is at a disadvantage and must work harder to catch up. Another antonym is a "fair game," where both teams have equal chances of winning without any advantage or disadvantage. Additionally, a "friendly game" is a match played for fun and has no competitive or serious undertones. Finally, a "non-competitive game" is a game played without a winner or loser, where the focus is more on participation and enjoyment rather than winning or losing.