The story of Martianoids takes place on a distant planet, where an alien race has invaded Earth. The player must navigate through the planet's surface, avoiding obstacles and fighting off hostile creatures to reach the Martian mothership.
The gameplay in Martianoids involves action-packed sequences as the player controls a spaceship through treacherous terrain, dodging enemy fire and collecting power-ups to aid in their progress. The game features various levels, each with its own unique challenges and objectives, requiring strategic thinking and quick reflexes to overcome.