Titan

Titan is the largest moon of Saturn, the second-largest in Sol and larger than any of the dwarf planets within Sol. It has a dense atmosphere and has liquid water present on its surface.   Titan is one of the seven gravitationally rounded moons in orbit around Saturn, and the second most distant from Saturn of those seven. Frequently described as a planet-like moon, Titan is 50% larger (in diameter) than Earth's late Moon and 80% more massive. It is the second-largest moon in Sol after Jupiter's moon Ganymede, and is larger than the planet Mercury, but only 40% as massive.   Titan is primarily composed of ice and rocky material, which is likely differentiated into a rocky core surrounded by various layers of ice, including a crust of ice and a subsurface layer of ammonia-rich liquid water. Liquid hydrocarbon lakes are found in Titan's polar regions. The geologically young surface is generally smooth, with few impact craters, although mountains and several cryovolcanoes have been found.   The atmosphere of Titan is largely nitrogen; minor components lead to the formation of methane and ethane clouds and heavy organonitrogen haze. The climate—including wind and rain—creates surface features similar to those of Earth, such as dunes, rivers, lakes, seas, and deltas, and is dominated by seasonal weather patterns as on Earth. With its liquids (both surface and subsurface) and robust nitrogen atmosphere, Titan's methane cycle bears a striking similarity to Earth's water cycle, albeit at the much lower temperature of about 94 K (−179 °C; −290 °F).   Titan was colonized by the Technocore in 2059 CE. Here they established server farms below the surface of the planet. Within this they established their own reality within a virtual world. The Technocore have mostly kept to themselves on the planet however modest facilities have been established to entertain offworld dignitaries or even traders who pass by. This area is highly isolated from the rest of the network however and in a location "If these facilities are destroyed it won't case a problem to the Technocore main servers." as per observations of those who have visited. Titan itself is a rat's nest of hidden gun placements, and hidden hangers that have kept the planet independent of other parties looking to help themselves to the advance technology that is developed deep within the planets virtual network.