Article 13

Article 13 is a TESTBED boss that was added at an unknown release date.

Design
Article 13's design features a big dark blue circle with 12 yellow decentralizer turrets arranged in a circle.

Technical
Article 13 may be be able to fire around 4 of its decentralizer turrets at you, and these decentralizer bullets are dangerous and are capable of 1-shotting you. This boss may also be able to autospin.

Spawning
The boss will not spawn unless its used by a beta tester or spawned in with the create entity command.

Countering
Even though its most likely not going to be encountered in your play through of the game its best to circle around it while shooting in order to trick its cannons into firing at you and missing.

Trivia

 * This boss is closely related to its real life counterpart article 13 which is not a tank but instead something else.