Robo-scorpion

"Intruder, you will not escape the eyes of my robo-scorpions! Or their pincers!"

- Mobius

Robo-scorpion is a special security robot produced by the Big MT company and serve as robotic guardians for the Big Mountain Research and Development Center. They have a scorpion form with a yellow body, two red pincers, red tail and other parts in green.

Background
The robo-scorpions were created by Dr. Mobius in Big MT based on scorpions and powered by a fission battery. Early versions were based on normal scorpions however later versions created by Mobius were based off of the radscorpions which had occasionally wandered into Big MT. They were created for security at the facility as robotic guardians at first, but after the exile of Mobius, they became his personal army, principally used to constantly distract the think tanks preserving the loop implemented by Mobius. According to Mobius, they can form themselves from floor panels along with any other random parts lying around. They are very fast and extremely resistant, and the effect of pulse weapons cause less damage to them compared to other robots. After their death, they cause an electrical explosion that can deal damage to anyone around.

Variants
Robo-scorpions appear in Mk 1, 2, 3, 3b, 4, 5, 5b, and come in stinger, blaster, and bomber variants as well as different sizes relative to their Mark. Their appearance in the game may depend on the following:
 * According to player level.
 * Importance of the area being defended.

Pincer series
The fastest robo-scorpions. They can only use their pincers but track and comes in melee quickly.

Blaster series
These shoot a long-distance electric blue beam from their tail with an average rate of fire and very high damage.

Bomber series
They have the ability to become invisible due to the Stealth Boy integrated in them.

X-42 giant robo-scorpion
Encountered in the Forbidden Zone Dome entrance, the X-42 giant robo-scorpion is a unique robo-scorpion and Dr. Mobius' ultimate creation. It's by far the most powerful entity in the entire game, possessing more HP and DT than any other (some Mister Gutsy and Sentry Bot variants have 25 DT also but not nearly as many hit points). It's armed with a powerful atomic laser capable of instantly killing anyone in one hit.

Notable quotes

 * "Robo-scorpion... attack!"nvdlc03gen_attack_00015ed9_1.ogg
 * "Go my minion, sting them in the name of all that is Mobius."nvdlc03gen_attack_00015eda_1.ogg
 * "X-42, attack! In the name of Mobius!"nvdlc03gen_attack_00015ee0_1.ogg
 * "Stop that, you'll damage the hull!"nvdlc03gen_hit_00015e7b_1.ogg
 * "Destroy this one, I make more!" nvdlc03gen_hit_00015e7d_1.ogg

Appearances
Robo-scorpions appears in the Fallout: New Vegas add-on Old World Blues.

Behind the scenes

 * The robo-scorpion is based on the scorpitron of Wasteland, the 1980s game which is considered to be Fallout's predecessor.