Stealth Suit Mk II

The Stealth Suit Mk II, also known as Aural Stealth Suit and referred to by Dr. Borous as the psychoanalytic cardiac-dampening sneaky stealth suit, is a unique piece of medium armor in the Fallout: New Vegas add-on Old World Blues. It is found in the X-13 research facility.

Background
Created by Big MT researchers in the X-13 research facility after the assassin suit was completed. A researcher named Kael developed the firmware, which auto-updates and provides real-time feedback on battlefield conditions, automatically fitting itself to the user's shape and frame. These upgrades are necessary for the user to benefit from the more advanced subsystems. The entire initiative was referred to as Project: Blue Blood.

The suit has an artificial personality central control system, which controls the built-in medical dispenser, capable of injecting Med-X and stimpaks automatically when needed, controlling the heartbeat of the wearer through a specialized cardiac regulator. The suit reminds the wearer of an active Pip-Boy light and should the user be poisoned by a cazador, the suit will dispense a stimpak if available and cure the poison. When the user is crippled while wearing the suit, it will dispense Med-X.

The suit, X-2 transmitter antenna array, and Sonic Emitter, were given by the Think Tank to the Courier to take back control of Big MT for themselves from Dr. Mobius.

Upgrades
The suit can be upgraded in the course of four stealth tests in the X-13 facility. Bonuses from upgrades are cumulative.
 * Firmware version 1.1 - Adds a bonus of +10 to Sneak (Stacks with the +15 Sneak already on the armor, giving +25 to Sneak).
 * Firmware version 1.2 - Adds a bonus of +1 Perception.
 * Firmware version 1.3 - Adds a bonus of +1 Agility.
 * Firmware version 1.4 - Adds a bonus of +20% to Stealth movement speed.

Locations
It is found in three pieces in the X-13 research facility. One part in each of the three labs in the first hallway after entering the facility.

Behind the scenes

 * The on-board computer is voiced by Qore hostess Veronica Belmont, who also voices Light Switch 01 and 02, and the original unaltered voice of Christine Royce.
 * According to Chris Avellone, the suit is meant to make its users "emotionally and physically co-dependent."
 * Opening the NVDLC03AuralStealthSuitQuest entry that governs the suit's unique features and dialogue in the GECK includes an "Advanced Optics" upgrade, after the v1.4 upgrade run. The Stage check for the v1.4 upgrade bark from the suit is set to 50, and the dialogue line for Advanced Optics is at 100, an invalid entry. Delving into the script file in the Quest data tab also shows that this would have been done in a VR test.
 * There is another unused script "NVDLC03StealthSuitISFXSCRIPT," which contains "Vision Firmware Upgrade." When the player crouched, it was going to apply 2 ImageSpaceModifiers and play the UIRadioSignalFound sound. Then when the player stands up, it would remove the effects and play the UIRadioSignalLost sound.

Bugs

 * There is a bug where, after the suit auto-applies a stimpak, your health will not increase, keeping your health at the minimum threshold for the damage script. This causes the suit to use a stimpak every time you're injured, as you drop below the scripted HP, burning through stimpaks extremely quickly.
 * Before starting the stealth research in X-13, make sure all armor pieces are in your inventory. Starting the run before the pieces are taken may bug the script and result in not getting the armor.
 * The suit can administer Med-X anytime the user enters combat or anytime the stealth status changes from [HIDDEN] to [CAUTION], even if no damage has been taken by the player.
 * When fully upgraded, it doesn't boost your sneak speed by the said 20%.
 * In third-person view, rotating to the front side of your character can sometimes cause the head and arms of the player character to disappear, immediately reappearing once the camera returns to the rear.