Sibelons (commonly known as Sibs) are the mothership aliens of the Lower Maps that has a large amount of HP, Shields, and an impressive amount of attack damage that is deadly to newer players. Caution is advised if you have NOT tried attacking this mothership alien before. Attack these in an outfit if you are a low-level player, as they are a rather tough alien.
Sibelon are known for their slow speed and large HP, which make them a time consuming kill, vulnerable to enemy players attacking you. For newer players, it is often recommended to attack these aliens in a rather large group. Most Sub-Elite players are easily able to take it down. A popular method of taking this alien down is by circling it, or by dragging it in a straight line just outside the damage area. This is done by going in a circular motion to avoid the damage received by it while lowering its HP. A Sibelon is about twice as powerful as Devolarium and half as powerful as a Boss Devolarium.
Since the latest update of the 5th anniversary of DarkOrbit, Sibelon have updated to look more as an alien spaceship which has eyes and somewhat of a body. The Boss version has a larger body but other wise looks the same with a red outer glow in the front. Like most Uber Alien, the Uber Sibelon looks like a Boss Sibelon with a red outer glow emanating from it.