What if the enemy were no longer out there in space, but right here on Earth, building massive fortifications in our oceans? What if the enemy's presence and mission to exterminate the human race had finally been discovered? Those pounding explosions you hear, they're only the beginning--the beginning of the end of humanity. And only you can stop it.

As a 26th century Earth Oceans Alliance (EOA) hydrofighter pilot, your mission is to destroy the aquatic-based aliens. Armed with the latest in underwater technology, you are Earth's only hope for victory. Some missions put you in the cockpit of the Hydra, a sleek, deadly hydrofighter prototype. Others take advantage of your aquatic combat suit's deep sea-pressure handling capabilities.

Relentless encounters with powerful biomechanical aliens continually challenge you to make strategic as well as combative choices. The alien's underwater defensive shield will vaporize human craft--can the shield be disabled, or is there a way around it? A found crystal may help you to navigate an alien ship, or it could explode upon contact--do you risk the chance? The wrong answers mean certain death.