Size Up: Giant Fighter Game is a bout running to gather strength so that you can face a challenger in the ring. You are playing as an up-and-coming fighter who has decided to become the strongest. However, they must run a gauntlet and earn the right to fight. Each fight will be at the end of a long road where the fighter can gather strength and wealth before facing the opponent. Once in the ring, they must rely on their strength and timing to defeat their opponent and claim the crown.