John Lars Shoberg Knihy

Lankmere was a peaceful planet, with no firearms and no wars throughout its history. Shortly after the human military arrived to try and figure out how the Lankmerans managed it, another humanoid race suddenly appeared from nowhere. Dressed in red environmental suits and bearing laser rifles, they immediately start killing everyone. Where did they come from, and why were they here? If the human don't step in to protect them, the Lankmerans will be exterminated.