Documented for this version
Which controls does this version use?
Actions
Keyboard | Use the arcade directional control with spear-gun input, plus coin and start inputs. Verify the Orca mapping in the emulator. Verify the loaded Arcade Systems build instructions when the public sources do not provide a complete control table. |
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Control notes
The loaded Arcade Systems mapping takes priority over generic labels.
How it plays
How does Marine Boy play?
Swim downward, fire the spear-gun at threats, avoid fish, eels, orcas, and turtles, manage the oxygen supply, and reach the clam at the bottom before losing a life.
Plan your run
What is the best way to play Marine Boy?
Keep a clear lane before descending, fire only when a creature blocks progress, and prioritize oxygen and safe movement over chasing every target or bonus.
Community discussion
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