Robo-scorpion

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 original robo-scorpion was created before the Great War by Dr. Mobius and his team in the X-42 robo-warfare facility in Big MT for the US military. Despite its superior Saturnite plating and an atomic blaster in the tail, certain kinks in design and programming prevented it from reaching battlefield deployment.

The smaller versions were created for security at the Big MT by Mobius following his departure from the think tank. They were inspired by real scorpions and envisioned as robotic guardians with a tail-mounted energy bolt blaster, optical systems allowing Mobius to see through them and public adress systems allowing him to speak through them. According to Mobius, they are simple enough to 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. The X-42 giant robo-scorpion is a special model adorned with a Saturnite armor plating making it virtually impervious to small arms fire and an improved EMP shield. It also equipped with a powerful tail-atomic laser which it draw the required energy in its internal generator capable of causing severe damage and leaving residual radiation of about 30 rads per second for one second as well as having a blast area of about 3 meters.

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:
 * 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, the X-42 giant robo-scorpion is a unique robo-scorpion and Dr. Mobius ultimate guardian. It is by far the toughest entity in the entire game, possessing more HP than any other enemy. It is armed with a powerful atomic laser capable of causing severe damage and radiation damage of about 30per second for one second as well as having a blast area of about that of a pulse grenade.

Notable quotes
It should be noted that quotes are from the robo-scorpions, but are transmitted to the Courier by Mobius, their creator and master, through the robo-scorpions.
 * "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'll make more!" nvdlc03gen_hit_00015e7d_1.ogg

Appearances
Robo-scorpions appear only 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.