: Ten years later, a new crisis emerges. During his battle to save the zone once more, Opa-Opa discovers a tragic truth: the mastermind behind the enemy forces is actually his long-lost father.

: In the space year 6216, a hero named Opa-Opa successfully defended the "Fantasy Zone" from invading forces.

Opa Stories: Memories Over the Past Nine Decades - Amazon.com

The primary story related to this character, specifically detailed in Fantasy Zone II: The Tears of Opa-Opa , is a surprisingly somber tale for such a colorful game:

: In Australian military contexts, "RAR" stands for the Royal Australian Regiment , often mentioned in stories of veterans (sometimes called "Opa" by their grandchildren) serving in operations like Borneo, Vietnam, or Iraq.