Prehistoric Isle in 1930

Prehistoric Isle in 1930 (Genshi-Tou 1930's in Japan) is a horizontally scrolling shooting game developed by SNK and released in arcades in 1989. A sequel entitled Prehistoric Isle 2 was released in 1999.

Gameplay
The player takes control of a biplane armed with a forward-firing machine gun. It can also be equipped with an option weapon pod that can be rotated clockwise around the craft. The option's attack changes depending on where it is currently positioned:


 * When directly above or below the plane, the option fires energy waves that reflect back upon contact with a surface.
 * When diagonally above the plane, the option fires balls of energy that bounce off surfaces at a 45 degree angle.
 * When diagonally below the plane, the option drops bombs.
 * When directly in front of the plane, the option replaces the default machine gun with its own flame cannon.
 * When directly behind the plane, the option deploys aerial mines.

Story
Ships have been mysteriously disappearing in the vicinity of the Bahamas for years. Now, in 1930, the United States government sends an expedition to the area in a flying boat to determine the cause. As they survey the ocean, the expedition comes across an uncharted landmass which they dub "Greenhell Isle" and launches two reconnaissance biplanes to take a closer look. As they investigate the island, the biplanes come under attack by dinosaurs and other life forms that were thought to have become extinct millions of years ago.

Epilogue
Their investigation concluded, the biplanes land aboard the flying boat. It's time for the expedition to return to civilization and share their shocking discoveries about the existence of prehistoric life. However, a flock of pterosaurs collides with the flying boat, killing everyone on board. The disappearances will remain an enigma. The expedition has become another victim of this region - the Bermuda Triangle.