The Sky Server is where various areas within Portal Breach's main planet's atmosphere are found.
The skies spread high above the tallest buildings and skyscrapers of Portal Breach. Very few venture this high, or even dare to go beyond. But sometimes, staring up at the clouds, the sun's glare plays a trick on one's eyes. Perhaps one might see a dark shape peeking out from between the clouds? There might be certain areas there, both seen and unseen.
The sky is but a sliver of the atmospehre, but it might just hold as many mysteries as the ground below.