Editing E1M4: Command Control (Doom)

{{Knee-Deep in the Dead|consolever=MAP04: Command Control (Console Doom)|snesver=E1M4: Command Control (Super NES Doom)}}
{{map|slot=E1M4}}
'''E1M4: Command Control''' is the fourth map of [[Knee-Deep in the Dead]] in [[Doom]].  It was designed by [[Tom Hall]], [[Sandy Petersen]],{{cite web|author=[[Frans P. de Vries (Xymph)|Vries, Frans P. de]]|title=Who designed which levels?|url=https://www.gamers.org/pub/idgames/docs/faqs/designer.txt|publication=|publishdate=22 August 1997|accessdate=13 November 2023}}{{cite web|author=Craddock, David|title=Pause Screen: Sandy Petersen, Renderer of Veils|url=https://www.shacknews.com/article/101156/rocket-jump-quake-and-the-golden-age-of-first-person-shooters?page=9|publication=Shacknews|publishdate=4 December 2017|accessdate=13 November 2023}}{{cite web|author=[[Sandy Petersen|Petersen, Sandy]]|title=Doom Episode One And I|url=https://www.youtube.com/watch?v=h8Rm8fR8XKE&t=280s|publication=YouTube|publishdate=23 Jul 2021|accessdate=13 November 2023}} and [[John Romero]], and uses the [[Doom music|music]] track "Kitchen Ace (And Taking Names)".  The [[par time]] is 1:30.

== Walkthrough ==
{{Maptabs|E1M4 walkthrough.png|E1M4 map.png|Map of Command Control|300x300px}}
{{map spots}}

===Essentials===
You begin in a short corridor (''A''), facing a door.  Behind the door is a green rectangular room with three corridors leaving it to the west.  Take the center corridor, and run to the lift that lowers as you enter the next room (''B'').  At the top of the lift, turn right and enter a large round room.  The structure in the center, which opens as you approach it, contains the [[blue key]] (''C'') and a [[chaingun]].  (If the doors should happen to close while you are inside, walk again over the small lighter-colored square where the key was).  After picking up the blue key, leave the round room to the west, turn left, and look for a blue door ahead of you to the right (''D'').  Behind the blue door is a gray maze.  To get through the maze quickly, take the first right and bear slightly left to go down a long corridor heading north.  At the end of the long corridor, turn right, then immediately left, and then left again.  (You will notice the wall [[texture]] changes in the hallway ahead.)  The passage widens into a room containing a [[green armor]] and the [[yellow key]].  Get the yellow key (''E''), then go up the staircase to the north, which leads to a yellow door (''F'').  Click the switch next to the door (this raises the bridge leading to the exit door), then go through it.  Turn right and cross to the gray door, but when you reach the door, turn around, and you will see the exit door up the stairs to the west (''G'').  Go through the exit door and press the switch.

===Other points of interest===
If you leave the green rectangular room through the right-hand corridor, you will come to a room with a wide ledge containing a [[blue armor]] (''H'').  Get to the ledge using the brown lift at the east end of the room, which rises as you step onto it.  (That lift only rises once, so if you fall off the ledge, you cannot get back on.)  As you step on the blue floor, a trap opens behind you (''I''), revealing a [[shotgun guy]] ([[I'm too young to die]] and [[Hey, not too rough]]), or three [[Zombieman|zombiemen]], two shotgun guys, and an [[imp]] ([[Hurt me plenty]]), or two zombiemen, a shotgun guy, an imp, and a [[demon]] ([[Ultra-Violence]] and [[Nightmare!]]).

Two openings (''J, K''), containing [[barrel]]s and zombiemen, overlook the green rectangular room (in between the three corridors on the west side).  These are accessible by leaving the large round room to the north and to the southeast.

After your first right turn in the maze, if you bear slightly right instead of slightly left, you will enter a zig-zag corridor containing a [[box of bullets]] (''L''), guarded by a demon (HMP and lower) or three demons (UV and NM).

To the east of the exit staircase is a computer room with a blue floor (''M'').  This room contains two [[Box of rockets|boxes of rockets]], but as you walk around the perimeter, you may trigger a trap (''S'') which slides the computers into the floor, revealing a shotgun guy and an imp (HMP), or two shotgun guys and an imp (UV and NM).

You can complete the level without the yellow key.  Press the switch next to the yellow door, then retrace your steps through the maze, head north from the blue door as far as you can, and turn right into the blue computer room.  Or, to take a shortcut (albeit one with the added risk of falling into a slime pool), walk through the window just east of the yellow key.  A very narrow ledge runs along the wall to the right, above the [[Damaging floor|nukage]] pool, which allows you to reach the stairs on the south side (''N'') without taking any damage.  Go up the stairs, then leave this room to the east and follow the short passage into the blue computer room.  Once in the blue computer room, open the west door and ascend to the exit.

===Secrets===
# In the short corridor where the player starts, there is a secret door on the south wall. It reveals a small room (''O'') containing a [[backpack]], a [[medikit]], and a [[box of shells]]. ('''sector 75''')
# From the green rectangular room, leave through the left-hand corridor. This leads to a room containing a [[slime]] "river". Drop down into the slime river and go east. You will reach a room (''P'') containing a [[rocket launcher]] and various other supplies. ('''sector 99''')
# The alcove at the north end of secret #2 is really a lift (''Q''); the switch to the left will cause it to rise. The [[soul sphere]] ('''sector 102''') visible from the green rectangular room is then accessible (with great care, it is possible to flip the switch while standing on the lift). '''The lift only rises once, so if you miss it, you cannot get the supercharge nor the secret sector'''. To escape the slime river and return to the rest of the map, you must now run to the other end and take the lift out (''R'').

===Bugs===
Sector 41 (the yellow door) is incorrectly assigned [[tag]] number 3, which is used for the square lift just east of the large central room (''B''). If the lift is in use, the door cannot be opened and vice versa because Doom only allows a sector to undergo one movement type at a time. Due to the distance and maze between the door and the lift, however, this bug is unlikely to affect normal play unless it is a multiplayer session or you have left many monsters alive in the early areas. ([[Boom]] and many subsequent ports have removed this [[limit]] and allow a sector to perform multiple movements simultaneously.) This bug was fixed in the 2019-2020 releases of [[Doom Classic Unity port|Doom Classic]], in which sector 41 is untagged.

The [[Flawed collision detection|blockmap bug]] can occur in the long central corridor of the maze.

[[Sidedef]]s 345, 353, 369, and 379 are missing their lower textures, and sidedef 872 is missing its upper texture.  Each of these results in a small [[Hall of mirrors effect]] (see demo below).

Two [[4 shotgun shells|shell pickups]] ([[Thing]]s 16 and 48) have no flags set for any of the three [[Skill level#Doom skill levels|difficulty classes]], so they do not actually appear in the level.

Sectors 9, 105, 132 and 137 that make up the door frames of the inside of the blue key room are recessed into the floor 8 [[Map unit|unit]]s. However, they lack lower textures on the door sides leading to some bleeding when viewed from inside the room.

Examining tangentially the small nukage pools near the blue key chamber may reveal several [[slime trails]] (see screen shots below).

There are 21 [[Blind spots in Doom reject tables#E1M4: Command Control|known anomalies]] in this level's [[REJECT|REJECT table]].

[[Linedef]]s 608 and 609 have orphaned tags.

===Demo files===
* [[Media:e1m4secr.lmp|No monsters, 100% secrets walkthrough]] ([[:Image:e1m4secr.lmp|file info]])
* [[Media:e1m4wik1.lmp|100% kills, items, and secrets on ITYTD]] ([[:Image:e1m4wik1.lmp|file info]])
* [[Media:e1m4wik2.lmp|100% kills, items, and secrets on HNTR]] ([[:Image:e1m4wik2.lmp|file info]])
* [[Media:e1m4wik3.lmp|100% kills, items, and secrets on HMP]] ([[:Image:e1m4wik3.lmp|file info]])
* [[Media:e1m4wik4.lmp|100% kills, items, and secrets on UV]] ([[:Image:e1m4wik4.lmp|file info]])
* [[Media:e1m4linz.lmp|Five small HOMs due to missing textures]] ([[:Image:e1m4linz.lmp|file info]])

== Areas / screenshots ==
<gallery mode=nolines widths=160px>
E1M4 first room.png|Start point
E1M4 second room.png|Green rectangular room
E1M4 round room.png|Large round room
E1M4 maze south.png|Within the maze
E1M4 maze north.png|Approaching the yellow key
E1M4 yellow door.png|Press the switch to raise the exit bridge
E1M4 exit.png|The end
E1M4 wide ledge.png|The blue armor room
E1M4 not a swastika.png|The blue computer room
E1M4 yellow key.png|Nukage pool with narrow ledge and staircase
E1M4 slime river secret.png|At one end of the slime river (secret #2)
</gallery>

===[[Slime trails]]===
<gallery mode=nolines widths=160px>
E1M4 trail round room NW.png|Large round room (north side, looking southeast)
E1M4 trail round room NE.png|Large round room (east side, looking southwest)
E1M4 trail round room SE.png|Large round room (south side, looking northwest)
E1M4 trail round room SW.png|Large round room (west side, looking northeast)
</gallery>

== Speedrunning ==

===Routes and tricks===
====Ledge run====
It is possible to jump across the [[Damaging floor|nukage]] pool from the east side (onto the narrow ledge). This allows one to go directly to the [[yellow key]], bypassing the [[blue key]] and the maze.

The story behind the discovery of this trick is given by [[Compet-n]]:

:The first player to discover the trick was [[Steffen Winterfeldt]], who sent his demo to [[Yonatan Donner|Yonatan]], but for some reason this was not included in COMPET-N. Later, [[Jonas "Chrozoron" Feragen]] independently discovered the trick. As he was never a COMPET-N player, he sent his demo to Yonatan, who did not upload this either. Later, [[Rudy Jurjako]] also discovered the same trick. He somehow sensed the truth in his text file: "I have a hard time believing that I was the first to discover that jump...". Just one day later, [[Ralf Schreivogel]] also discovered the jump, not knowing of Rudy and the other people. [https://web.archive.org/web/20210506130212/http://www.doom2.net/compet-n/index.cgi?action=nostalg&page=e1m4-2]

Rudy Jurjako's demo {{competnftp|doom/speed/e1m4-017.zip}} was 0:17 in length (August 18, 1998), beating Yonatan Donner's 0:22. {{competnftp|doom/speed/e1m4-022.zip}} The best time using this trick is 0:16 by [[Adam Hegyi]] (August 25, 1998). {{competnftp|doom/speed/e1m4-016.zip}}

[[John Romero|Romero]] has confirmed in a reply to [[Adam Williamson]] that the trick was inserted deliberately:

:''Here's the answer, straight from The Man who mainly designed E1M4, [[Tom Hall]]: "Heeeeeeeeeee. Yeah, I'm pretty sure. :) But not sure if you can get to it.... it stops before it gets to the stairs now...so I think you'd have to get propelled backward somehow... so long ago though...''

:''I totally forgot that this was in [[Knee-Deep in the Dead|episode 1]]...man, I should play it again...yeah, like I have time..."''

:''So... i think he *did* design it for a shortcut.''

:''John Romero''

====Exit jump====
Using [[straferunning|strafe 50]], it is possible to jump across the 192-[[Map unit|unit]] gap in the exit room, completing the level without any keys at all. This trick was created by Adam Hegyi and first submitted on June 8, 1999. {{competnftp|doom/speed/e1m4-014.zip}} The time was subsequently refined to 0:13 by [[Jonathan Rimmer]] {{competnftp|doom/speed/e1m4-013.zip}}, and ultimately to 0:12, believed to be optimal, by Hegyi. {{competnftp|doom/speed/e1m4-012.zip}} However, [[Andrey "entryway" Budko]] reached 0:11 in his [[TAS|tool-assisted run]] of the episode, using strafe 50 throughout the entire map.

Because a tiny error in the player's [[angle]] can cause the jump to fail (the maximum possible distance of such a jump is [[Straferunning|194 units]]), it is considered too risky to use in an episode run.

The gap can also be crossed without strafe 50, by [[rocket jumping]]. Due to the detour involved in grabbing the [[rocket launcher]] (and the [[soul sphere]], in order to survive the blast), this only saves time in the [[NM100S]] style.

====Other tactics====
If none of the above tricks is used to bypass the blue key, the time of a straight speedrun is largely determined by how well you dodge [[monsters]] in the maze, especially as you enter the yellow key room.

By opening the yellow door before pressing the switch, you can run onto the exit bridge from the side as it rises.

[[UV max]] and [[UV -fast]] runs generally use this route:
* Get the [[shotgun]] from the [[shotgun guy]] in the [[blue armor]] room immediately, then go to the soul sphere.
* Open the blue armor trap, get the blue key, then clear the blue computer room.
* Clear the maze by killing the two southernmost [[imp]]s, firing a shot in the long central corridor to wake up most of the other monsters, then firing [[rocket]]s northward up the central corridor. (This is extremely dangerous in [[-fast]] mode, because of the [[demon]]s' doubled speed.)
[[Anders Johnsen]] credits [[Peo Sjöblom]] with inventing the route. {{competnftp|doom/max/e1m4-153.zip}}  The use of rockets is remarkably consistent from one Compet-n entry to the next: two in the green rectangular room (to kill the two demons), two or three in the blue computer room, and the rest in the maze.  In an episode run, the very first step is of course redundant, but is usually done anyway to draw a crowd of monsters to the south end of the green rectangular room (for more infighting and more efficient use of blast damage).

The efficient use of [[Barrel|barrel frags]] can greatly reduce the time of such a run. (Therefore, clear the blue computer room from the south side.) Some luck is also required, since stray monsters can easily be left behind in the two passages overlooking the green rectangular room.

It is possible to jump over the [[slime]] river by [[straferun]]ning.  This saves a small amount of time in runs requiring [[Intermission screen|100% kills]], by making it easier to avoid exploding barrels on the way to the rocket launcher.

In NM100S, the shortest route from the soul sphere to the large round room is to jump down into the green rectangular room, then immediately turn left.  For episode runs, many players instead use the slime river to conserve health.

Due to the linearity of the map (only the green rectangular room needs to be entered twice), [[UV -respawn]] differs from UV max only when the player must pause briefly to fight a crowd, as with the entrance to the yellow key room.  A truly optimized run might kill a few people twice in the green rectangular room and the yellow key area, then skip the blue computer room; or kill a few people twice in the green rectangular room and the blue computer room, and ignore monsters who do not enter the central corridor of the maze right away.

[[UV Tyson]] runs are somewhat faster when there is a lot of [[Monster infighting|infighting]] in the green rectangular room (including monsters from the blue armor room) and near the blue door.

[[UV pacifist]] runs tend to use the same routes as [[UV speed]] runs.

===Current Compet-n records===
The [[Compet-n]] records for the map are:

{| {{prettytable}}
! Run !! Time !! Player !! Date !! File !! Notes
|-
|[[UV speed]]||00:12||[[Adam Hegyi]]||2001-04-11||{{competnftp|doom/speed/e1m4-012.zip|e1m4-012.zip}}||
|-
|[[NM speed]]||00:13||[[Adam Williamson]]||2000-06-06||{{competnftp|doom/nmare/n1m4-013.zip|n1m4-013.zip}}||
|-
|[[UV max]]||01:31||[[Drew DeVore (stx-Vile)]]||2003-02-06||{{competnftp|doom/max/e1m4-131.zip|e1m4-131.zip}}||
|-
|[[NM100S]]||00:22||[[Vincent Catalaá (Peroxyd)]]||2001-11-15||{{competnftp|doom/nm100s/n1s4-022.zip|n1s4-022.zip}}||
|-
|[[UV -fast]]||01:45||[[Radek Pecka]]||2003-02-01||{{competnftp|doom/fast/f1m4-145.zip|f1m4-145.zip}}||
|-
|[[UV -respawn]]||01:35||[[Radek Pecka]]||2003-02-02||{{competnftp|doom/respawn/r1m4-135.zip|r1m4-135.zip}}||
|-
|[[UV Tyson]]||04:10||[[Jim Leonard (Xit Vono)]]||2003-04-04||{{competnftp|doom/tyson/t1m4-410.zip|t1m4-410.zip}}||
|-
|[[UV pacifist]]||00:12||[[Adam Hegyi]]||2001-04-11||{{competnftp|doom/pacifist/e1m4-012.zip|e1m4-012.zip}}||
|}

''The data was last verified in its entirety on July 6, 2020.''

===Current DSDA records===
The records for the map at the [[Doom Speed Demo Archive]] are:

{| {{prettytable}}
! Run !! Time !! Player !! Date !! File !! Notes
|-
|[[UV speed]]||0:11.97||[[depr4vity]]||2020-03-05||{{dsda2ftp|doom/47574/p1m4-011.zip|p1m4-011.zip}}||Cross-listed from Pacifist
|-
|[[NM speed]]||0:12.77||[[Aleksey Kamenev (4shockblast)]]||2020-05-09||{{dsda2ftp|doom/47727/n1m4-012.zip|n1m4-012.zip}}||
|-
|[[UV max]]||1:28.77||{{dsda2user|id=kuckkuck|title=kuckkuck|linkonly=1}}||2024-01-01||{{dsda2ftp|doom/85404/E1M4m-128.zip|E1M4m-128.zip}}||
|-
|[[NM 100S]]||0:21.89||[[Aleksey Kamenev (4shockblast)]]||2020-03-13||{{dsda2ftp|doom/47581/n1s4-021.zip|n1s4-021.zip}}||
|-
|[[UV -fast]]||1:45.89||[[Radek Pecka]]||2003-02-01||{{dsda2ftp|doom/29598/f1m4-145.zip|f1m4-145.zip}}||
|-
|[[UV -respawn]]||1:35.77||[[Radek Pecka]]||2003-02-02||{{dsda2ftp|doom/29608/r1m4-135.zip|r1m4-135.zip}}||
|-
|[[UV Tyson]]||3:27.77||[[j4rio]]||2020-01-30||{{dsda2ftp|doom/47173/t1m4-327.zip|t1m4-327.zip}}||
|-
|[[UV pacifist]]||0:11.97||[[depr4vity]]||2020-03-05||{{dsda2ftp|doom/47574/p1m4-011.zip|p1m4-011.zip}}||
|-
|[[NoMo]]||0:11.66||[[depr4vity]]||2020-03-02||{{dsda2ftp|doom/47758/n1o41166.zip|n1o41166.zip}}||
|-
|NoMo 100S||0:20.94||[[depr4vity]]||2020-04-01||{{dsda2ftp|doom/48052/e1m4os020.zip|e1m4os020.zip}}||
|-
|[[Stroller]]||0:47.77||{{dsda2user|id=megasphere308|title=megasphere308|linkonly=1}}||2021-04-03||{{dsda2ftp|doom/52314/s1m4-047.zip|s1m4-047.zip}}||
|-
|[[Collector]]||0:31.60||{{dsda2user|id=cwp24|title=CWP24|linkonly=1}}||2020-06-06||{{dsda2ftp|doom/48188/e1m4-col.zip|e1m4-col.zip}}||
|}

''The data was last verified in its entirety on January 27, 2024.''

===Miscellaneous demos===
{| {{prettytable}}
! Run !! Time !! Player !! Date !! File !! Notes
|-
|[[UV built]]||00:12||[[Kai-Uwe Humpert]]||1999-11-03||{{competnftp|doom/built/b1m4-012.zip|b1m4-012.zip}}||A [[built demo]] which avoids the exit jump, but still gets 0:12 by using the ledge jump and the run to the rising bridge
|}

== Deathmatch ==

===Player spawns===
This level contains nine spawn points:
# facing east. ('''thing 184''')
# facing east. ('''thing 185''')
# facing east. ('''thing 186''')
# facing east. ('''thing 187''')
# facing north. ('''thing 188''')
# facing north. ('''thing 189''')
# facing north. ('''thing 190''')
# facing west. ('''thing 191''')
# facing east. ('''thing 192''')

== Statistics ==
===Map data===
{{mapdata|
  things=254|
  vertexes=780|
  linedefs=830|
  sidedefs=1054|
  sectors=139|
  vertexbefore=673}}

===Things===
This level contains the following numbers of [[thing]]s per [[Skill level#Doom and Doom II skill levels|skill level]]:

{{col-begin}}
{{col-break|width=33%}}
{| {{prettytable|style=text-align: center;}}
!colspan="4"|Single-player
|-
![[Monster|Monsters]]!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Zombieman]]||8||22||22
|-
|style="text-align: left;"|[[Shotgun guy]]||3||9||16
|-
|style="text-align: left;"|[[Imp]]||9||20||36
|-
|style="text-align: left;"|[[Demon]]||1||3||11
|-
![[Weapon|Weapons]]!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Shotgun]]||1||0||0
|-
|style="text-align: left;"|[[Chaingun]]||colspan="3"|1
|-
|style="text-align: left;"|[[Rocket launcher]]||colspan="3"|1
|-
![[Ammo|Ammunition]]!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Clip]]||9||11||9
|-
|style="text-align: left;"|[[Box of bullets]]||4||3||3
|-
|style="text-align: left;"|[[4 shotgun shells]]||5||4||4
|-
|style="text-align: left;"|[[Box of shotgun shells]]||colspan="3"|1
|-
|style="text-align: left;"|[[Rocket]]||colspan="3"|1
|-
|style="text-align: left;"|[[Box of rockets]]||colspan="3"|2
|-
![[Item#Doom games|Health & Armor]]!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Stimpack]]||colspan="3"|9
|-
|style="text-align: left;"|[[Medikit]]||colspan="3"|5
|-
|style="text-align: left;"|[[Armor]]||colspan="3"|1
|-
|style="text-align: left;"|[[Megaarmor]]||colspan="3"|1
|-
!Items!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Armor bonus]]||colspan="3"|14
|-
|style="text-align: left;"|[[Health bonus]]||colspan="3"|30
|-
|style="text-align: left;"|[[Supercharge]]||colspan="3"|1
|-
|style="text-align: left;"|[[Backpack]]||colspan="3"|1
|-
|style="text-align: left;"|[[Radiation shielding suit]]||2||1||0
|-
![[Key|Keys]]!!1-2!!3!!4-5
|-
|style="text-align: left;"|Blue keycard||colspan="3"|1
|-
|style="text-align: left;"|Yellow keycard||colspan="3"|1
|-
!Miscellaneous!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Barrel|Exploding barrel]]||colspan="3"|32
|}
{{col-break}}
{| {{prettytable|style=text-align: center;}}
!colspan="4"|Multiplayer
|-
!Monsters!!1-2!!3!!4-5
|-
|style="text-align: left;"|Zombieman||8||22||22
|-
|style="text-align: left;"|Shotgun guy||3||9||16
|-
|style="text-align: left;"|Imp||9||20||36
|-
|style="text-align: left;"|Demon||1||3||11
|-
!Weapons!!1-2!!3!!4-5
|-
|style="text-align: left;"|Shotgun||2||1||1
|-
|style="text-align: left;"|Chaingun||colspan="3"|1
|-
|style="text-align: left;"|Rocket launcher||colspan="3"|1
|-
!Ammunition!!1-2!!3!!4-5
|-
|style="text-align: left;"|Clip||9||11||9
|-
|style="text-align: left;"|Box of bullets||4||3||3
|-
|style="text-align: left;"|4 shotgun shells||5||4||4
|-
|style="text-align: left;"|Box of shotgun shells||colspan="3"|1
|-
|style="text-align: left;"|Rocket||colspan="3"|1
|-
|style="text-align: left;"|Box of rockets||colspan="3"|2
|-
!Health & Armor!!1-2!!3!!4-5
|-
|style="text-align: left;"|Stimpack||colspan="3"|9
|-
|style="text-align: left;"|Medikit||colspan="3"|5
|-
|style="text-align: left;"|Armor||colspan="3"|1
|-
|style="text-align: left;"|Megaarmor||colspan="3"|1
|-
!Items!!1-2!!3!!4-5
|-
|style="text-align: left;"|Armor bonus||colspan="3"|14
|-
|style="text-align: left;"|Health bonus||colspan="3"|30
|-
|style="text-align: left;"|Supercharge||colspan="3"|1
|-
|style="text-align: left;"|Backpack||colspan="3"|1
|-
|style="text-align: left;"|Radiation shielding suit||2||1||0
|-
!Keys!!1-2!!3!!4-5
|-
|style="text-align: left;"|Blue keycard||colspan="3"|1
|-
|style="text-align: left;"|Yellow keycard||colspan="3"|1
|-
!Miscellaneous!!1-2!!3!!4-5
|-
|style="text-align: left;"|[[Multiplayer#Cooperative|Cooperative start]]||colspan="3"|4
|-
|style="text-align: left;"|[[Deathmatch start]]||colspan="3"|9
|-
|style="text-align: left;"|Exploding barrel||colspan="3"|32
|}
{{col-end}}

== Inspiration and development ==
[[Image:E1M4_development.png|thumb|256px|These images show how the level evolved. The swastika room is the second large room from the left at the top of the 1.0 version. In version 1.4 its shape has changed.]]

E1M4 was started by [[Tom Hall]] and finished by [[John Romero]]. Primitive versions appeared as E1M7 of [[Doom 0.4]] and E1M7 of [[Doom 0.5]]. It may have been based on the "Enlisted Quarters" in episode one of the [[Doom Bible]], as the Doom 0.4 version contains locker rooms and showers. 

The version of E1M4 in [[Versions of Doom and Doom II#v1.0|Doom 1.0]] contained an inverted {{wp|swastika}}-shaped structure (see the map to the right), in homage to ''[[Wolfenstein 3D]]''. It was later changed to a traditionally oriented swastika in [[Versions of Doom and Doom II#v1.2|version 1.2]]. The symbol was changed again in [[Versions of Doom and Doom II#v1.4|version 1.4]], this time to a shape that only loosely resembles a swastika, shifting the vertical connectors horizontally outward. The [[Atari_Jaguar|Atari Jaguar]] port of Doom, based on version 1.2, instead chose to delete the vertical appendages altogether.

In regards to this, John Romero has commented:{{cite web archived|author=[[John Romero|Romero, John]]|title=Hangin' Out with John Romero!|url=http://www.loonygames.com/content/1.11/feat/|publication=loonygames|publishdate=2 November 1998|accessdate=15 August 2021|archiveurl=https://web.archive.org/web/20210307001223/http://www.loonygames.com/content/1.11/feat/|archivedat=archive.org}}

:"''Yes, ''[in {{wp|Commander Keen#Commander Keen in Goodbye, Galaxy!|Commander Keen 5}}<nowiki>]</nowiki>'' there is a swastika in one of the levels, one of my levels to be exact, but I removed it shortly after the game was released because people were upset that an {{wp|evil}} symbol was in a cute kid's game (the changed version is in the screenshot). It was a premonition of things to come, namely, Wolfenstein 3D. I also put a swastika in ''Doom''<nowiki>'</nowiki>s E1M4 as a Wolf3D reference, but I changed it later for the exact same reason.''"

== Trivia ==
The music for this level is inspired by the track "{{wp|Vulgar Display of Power|Rise}}" by {{wp|Pantera}}.

The first [[Doom novel]] references the swastika-shaped structure, when [[Doom novels#Flynn Taggart|Fly]] discovers "several {{wp|Cray}}-9000" computers had been placed together to create "a freakin' swastika".  He was unsure whether it was created by the alien invaders as a scare tactic or as a joke by certain [[UAC]] workers.

{{French level name|Centre de contrôle}}

== See also ==
* [[Command Control (Doom 2016)]] for this level's re-created version in [[Doom (2016)]].

== External links ==
* {{competnmap|1|115|E1M4}}
* {{dsda2|wad=doom|map=E1M4|title=E1M4 demos}}
* [http://ian-albert.com/games/doom_maps/ Top-down perspective view of all Doom levels] by Ian Albert

== Sources ==
* {{Wikipedia archived|title=Doom episodes and levels|timestamp=20071112114036}}

==References==
<references />

[[Category:Tom Hall levels]]
[[Category:Sandy Petersen levels]]
[[Category:John Romero levels]]
[[Category:Levels with extra equipment in co-op]]