Forgotten Worlds features two characters known as The Nameless Ones, who both look like Arnold Schwarzenegger, one even has a mohawk. It's their job to rid the planet of the attacking aliens.
Guiding your character around the screen as they fly with jet-packs, guns on full auto, you control a satellite which you rotate around your character for the direction in which your gun is firing. At the end of each level is a boss which needs to be killed to progress.
Enemies that have been killed drop money. At the end of every level is a shop where you can buy weapons, armour, items and first-aid packs.
Forgotten World was the first game which used the Capcom Play System-1 (CPS1) board developed in 1988.
The game includes one of the best Engrish texts, similar to Zero Wing'sAll your base are belong to us. In the seventh level's end intermission there is a quote from a blond guy: You cannot stop me with paramecium alone! It has been used in many forum signatures.