It is 2500 AD and humanity has penetrated the fringes of the galaxy, establishing colonies of peace from Mercury to Pluto.
Suddenly, the stillness of the Milky Way erupts into foamy fury as armadas of alien deathships invade our solar system like killer bees preying on an innocent bystander. No one is spared.
Even beloved Mother Earth is stung. These vicious cosmic Visigoths are war-starved Gyrusians. And, led by the immortal Genghis Khan (whom they recruited from Mongolia centuries ago), they are ready to sack civilization.
Along with our flattened galactic fleet, you are the only space cowboy who has escaped Gyruss' shroud of doom.
Now you must burn across the galaxy, liberating planets by zapping endless enemy attacks with Neo-Bomb-Blastic Cannons and Ultra-Lazonic Phasers.
So get ready for the fight of your life. And do not flinch, otherwise the whole universe will be pulverized!
