Aballon
As the closest world to the sun of the Pact System, Aballon is a warm ball of rock and precious metals. Its natural environment is a vast landscape of gray rock, replete with visible mineral veins and broken by the presence of impact craters and vast mountains of rock and iron. Little atmosphere envelops this planet, and beyond the protection of the immense megaplex settlements survival is difficult for any traditional organic lifeform. However, hidden atop and under the planet's surface are precious metals sought by countless civilizations, the ice necessary for environmental engines which facilitate non-robotic life-forms on the world, and the ruins of the mysterious species known as the First Ones.