Winterized T-51b Power Armor

The special winterized version of T-51b Power Armor appears in the Operation: Anchorage add-on for Fallout 3.

Characteristics
It is one of two armors used by U.S. Soldiers (the other armor of choice being Winterized Combat Armor) in the Anchorage Reclamation simulation and can be obtained from a weapon cache in the Outcast Outpost after completing the sim.

It is identical to the T-51b in Fort Constantine, other than having a lack of rust, having snow-camouflaged paint, and the main body of the suit has only 45 damage resistance compared to the rusted version's 50.

Although stat's officially state that the armor's damage resistance is at 45, its HP is almost ten million making it overall completely invincible as so its damage resistance or item value doesn't decrease at all and thus may be considered the best armor in the game.

Bugs

 * If you pick this armor up while doing the quest You Gotta Shoot 'Em in the Head the game confuses this for the T-51b Power Armor from Fort Constantine and completes the mission. It has been confirmed on the Xbox 360 and PC versions of the game that this also rewards the player with the Achievement. Mr. Crowley will no longer speak to you after getting the armor, besides saying, "You stole what is rightfully mine, get lost." One way to avoid this is to keep the winterized version in storage (eg: in the locker in your megaton house) while you complete the quest.
 * You can sometimes wear the Ghoul Mask, Shady Hat and various other head gear while wearing the Winterized T-51b helmet. When viewing your character externally, however, you'll only be wearing the helmet, whereas your inventory will show that you are wearing all of them. This is likely not a bug; it can be assumed that the character can wear the objects inside the helmet, because a Ghoul Mask would not rightly fit on the power armor helmet. Two exceptions are Poplar's Hood and Pint-Sized Slasher Mask; these head pieces will stick out of the helmet in some parts (such as the top clown hat of the Slasher Mask sticks out of the top of the helmet).
 * The armor the player acquires is the simulation version rather than the "Wasteland" version. The "Wasteland" version of this armor has normal item health and can be repaired using regular Power Armor, unlike the simulation version.
 * The GECK kit shows this version of the armor has the script effect of the old T-51b. Removing the script fixes the problem with the quest "You Gotta Shoot 'Em in the Head" if it's done before starting the quest. An earlier save also rectifies the problem, if you've started the quest already.
 * If you are wearing the Winterized T-51b and you delete the Operation: Anchorage game files you may be left with the armor's effects, but without the armor. Any other armor effects will stack, and even if you re-download Operation: Anchorage and get the Winterized Power Armor the effects will still be present. While not game-ruining, some people may not want this helpful bug so watch what you wear if you want to play fair. (Confirmed X360) This glitch appears to have been fixed (X360).
 * While wearing the armor, holstered/put away weapons will be right-side up on your back. And facing the opposite direction. (Confirmed 360)

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