From the game box:
The planet is dying. Cold winds blow. Fires rage. The trees are withering. In other words, it's brutal out there.
Only you can stop the Dark King from consuming the light from the Crystals of Earth. But don't think it will be a walk in the park. You're up against the sleaziest of slimebags, the evilest of ecto-scum - we're talking serious monsters here.
This isn't your basic shootem-to-smithereens kiddy game, either. You'll have to think your way out of some tough spots. Think you can handle that?