Editing Shield door

{{Status|Canon}}
{{Outdated}}
{{Center|For the fields used to contain pressurized spaces from a vacuum, see [[energy barrier]].}}
[[File:New Carbine Design2.jpg|thumb|tight|200px|One of the Shield Doors on [[Snowbound (Level)|Snowbound]].]]

'''Shield doors''' are energy fields that can repel [[plasma]], gunfire, [[vehicles]] and virtually any other object,<ref name="The Oracle">'''[[Halo 2]]''', campaign level ''[[The Oracle]]''</ref> with some types exclusively allowing living beings to pass through.<ref name="Snowbound">'''[[Halo 3]]''', multiplayer map ''[[Snowbound (Level)|Snowbound]]''</ref> They are similar in design to [[bubble shield]]s with differences being the color and infinite usage time. [[Anti-vehicle barrier]]s are a larger-scale application of shield door technology.

The technology has been used by the [[Forerunner]]s,<ref>'''[[Halo 3]]''', multiplayer map ''[[Epitaph (Level)|Epitaph]]''</ref>{{Ref/Reuse|The Oracle}} the [[Covenant]],{{Ref/Reuse|Snowbound}} and, to a limited extent, [[human]]ity.<ref>'''Halo 3: ODST''', [[Firefight]] map ''[[Alpha Site]]''</ref>

==Gameplay==
There are several in past Halo games and they appear in ''[[Halo 3]]'' on the multiplayer maps [[Epitaph]] and [[Snowbound]]. In the secondary versions of the maps Snowbound and Epitaph, namely [[Boundless]] and [[Epilogue]], the map shield doors are removed.

They are also featured as forge items in the [[Heroic Map Pack|Heroic]], [[Legendary Map Pack|Legendary]] and [[Mythic map pack|Mythic]] map packs and ''[[Halo Reach]]''. They can be placed in almost any door as well as anywhere else the Forge user desires.

If one stands exactly in the shield door's energy field, doing a melee or shooting in any direction will be negated by the shield. However, the player is still vulnerable from attacks from either side. This also works with the [[Bubble Shield]]. By overloading a map with shield doors (Using excessive Trip Mines to cause the map to lose control of the maps graphical and geometrical assets), the shield doors on a map will disappear.

==Trivia==
*Despite the fact that shield doors protect from projectiles, plasma and vehicles, explosions can still affect players and objects on the other side of them. A perfect example of this is the underground shield on Snowbound, where the nearby power coils can be detonated to instantly kill players standing on the ''other'' side. It is unknown if this is a glitch or Bungie meant to do this.
*The shield doors in ''Halo 3'' all appear to be of Covenant origin and have obvious projectors while the Shield doors in ''Halo: Reach'' appear to be of [[Forerunner]] origin and appear as a simple wall of energy with no obvious projection point.

==Gallery==
<gallery>
File:H2A-Forerunner cell.jpg|A Forerunner cell on [[Installation 05]] closed off by a shield door.
</gallery>

==List of appearances==
*''[[Halo 2]]'' {{1st}}
*''[[Halo 3]]'' 
*''[[Halo 3: ODST]]''
*''[[Halo: Reach]]''
*''[[Halo 4]]''
*''[[Halo 2: Anniversary]]''
*''[[Halo 5: Guardians]]''
*''[[Halo: Shadow of Intent]]''

==Sources==
{{Ref/Sources}}

[[Category:Security technology]]
[[Category:Shield technology]]