Grimstar: Crystals are the New Oil!

Year 3047, the elected government on Earth is long gone. Megacorporations are in control. "The Earth's resources have been used up and the energy crisis is upon us. But there is hope still - a discovery of a distant world, rich with a new kind of natural energy resource. They called the world Grimstar. Inhabited only by primitive insect-like creatures, it seemed like easy prey for aggressive colonization and mining. But they were deceived.