In 2517, the earth's resources were exhausted, and humans actively went to other planets to find alternative energy sources. The advance expedition team finally found a rich LALU crystal deposit on the planet Marcus. When this good news was sent back to Earth, the advance team lost contact within three days of landing, leaving only the help message of the attack by the worm...

The player plays the Marines accompanying the mining vehicle, and protecting the mining mission and resisting the Bugs attacks.