Gunvalkyrie is an action-adventure game for the Microsoft XBox released in March 2002. It is produced by Sega and developed by Smilebit. You're needed on the colonized planet of Tir na Nog to restore order. Once the Imperial Space Forces arrived to investigate the severed communication ties between the British Empire and the small planet, their worst fears were realized. The esteemed yet dangerous Dr. Hebble Gate was missing, along with the entire population of colonists, and the planet was overrun with vicious insect-like life forms. Dr. Gate had been using his Hebble Technology to extract vast amounts of energy from Halley's Core, a powerful substance left behind after the passing of Halley's Comet. It was later learned that Halley's Core can also radically alter the DNA of humans, and many suspect it was the Core that changed the colonists into the violent creatures running rampant around Tir na Nog. Battle through 10 massive levels filled with creatures attacking from every angle.
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