Fun Fact: Blaster Master was yet another game adapted into a novel for Nintendo's World of Power book series.
When Jason follows his pet frog Fred into a hole in the ground, Jason discovers a battle tank called Sophia the 3rd and a subterranean world full of radioactive mutants. Jason dons the pilot outfit he finds and uses the tank to defeat the mutants and save his pet frog.
Anyone who complains about the quality of modern-day video game narratives is well-advised to reflect on some of the tales that passed for stories in the NES era, but Blaster Master fans didn't care how strange the story was. They cared about smooth, tight controls and an extremely challenging shooter that alternated between platforming vehicle levels and top-down shooting levels where the player controlled their character outside of the tank. Blaster Master also had an excellent soundtrack.