Difference between revisions of "MAP24: The Chasm (Doom II)"

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{{map|slot=MAP24}}
 
 
{{Doom II 21-30}}
 
{{Doom II 21-30}}
'''MAP24: The Chasm''' is the twenty-fourth map of [[Doom II]]. It was designed by [[Sandy Petersen]] and uses the [[Doom II music|music]] track "In The Dark".
+
{{map|slot=MAP24|name=Chasm (Doom II)}}
==Strategy==
+
'''MAP24: The Chasm''' is the twenty-fourth map of [[Doom II]]. It was designed by [[Sandy Petersen]] and uses the [[Doom II music|music]] track "In The Dark". The [[par time]] is 2:30. As the name suggests, it is a large underground cavern with nukage-filled chasms and numerous thin walkways to move about.
[[Image:MAP24 map.png|thumb|300px|Map of MAP24]] <br clear="left"/>
 
  
===Walkthrough===
+
== Walkthrough ==
Carefully walk across the winding walkway (A) sprawling in front of you at the beginning of the level. Enter the building at the end (B). Inside, explore the maze-like interior, killing enemies along the way to clear your path. Once you pick up the blue keycard in the northwest corner of the building (C), return to the starting point.
+
[[File:MAP24 map.png|thumb|300x300px|Map of The Chasm]]
 +
{{map spots}}
  
Continue to follow the ledge around to the west, towards the blue door (D). Behind it are a series of extremely thin ledges (E). Walk straight ahead through the intersection and around to the plasma rifle. Upon picking it up, the floor inside the square will rise. After killing the cacodemons, continue along the narrow ledge and take the next right. Walk around the next square walkway to the left, picking up the items on the central platform (F). This causes the floor to raise again. Once the cacodemon has been killed, head north towards the platform with the hanging corpse dangling above it (G), and you'll be teleported to a new area.
+
===Essentials===
 +
Carefully walk across the winding walkway (''A'') sprawling in front of you at the beginning of the level. Enter the building at the end (''B''). Inside, explore the maze-like interior, killing enemies along the way to clear your path. Once you pick up the blue keycard in the northwest corner of the building (''C''), return to the starting point.
  
Proceed along the path and take a left at the branch. You'll arrive at two teleporters. Take the right (H) one to be transported to a pulsating blue room. In this next room, kill the demons lurking about. Drop down into the center of this room and flip the skull switch to the east (I). This causes a platform in the west to lower, so run over, ride it back up, and flip the second skull switch (J). This one lowers a platform in the north, so once again run onto it before it raises and flip the skull switch (K). This will lower the red keycard directly in front of you (L). Pick it up and exit this area by flipping the switch in the south and walking through the teleporter.
+
Continue to follow the ledge around to the west, towards the blue door (''D''). Behind it are a series of extremely thin ledges (''E''). Walk straight ahead through the intersection and around to the plasma rifle. Upon picking it up, the floor inside the square will rise. After killing the cacodemons, continue along the narrow ledge and take the next right. Walk around the next square walkway to the left, picking up the items on the central platform (''F''). This causes the floor to raise again. Once the cacodemon has been killed, head north towards the platform with the hanging corpse dangling above it (''G''), and you'll be teleported to a new area.
  
Once you're back in the previous area, walk along the ledge towards the red door. Be careful, as there's no way to escape the slime pit here. Go through the red door and the door directly behind it (M), through the exit door and into the exit teleport (N).
+
Proceed along the path and take a left at the branch. You'll arrive at two teleporters. Take the right (''H'') one to be transported to a pulsating blue room. In this next room, kill the demons lurking about. Drop down into the center of this room and flip the skull switch to the east (''I''). This causes a platform in the west to lower, so run over, ride it back up, and flip the second skull switch (''J''). This one lowers a platform in the north, so once again run onto it before it raises and flip the skull switch (''K''). This will lower the red keycard directly in front of you (''L''). Pick it up and exit this area by flipping the switch in the south and walking through the teleporter.
 +
 
 +
Once you're back in the previous area, walk along the ledge towards the red door. Be careful, as there's no way to escape the slime pit here. Go through the red door and the door directly behind it (''M''), through the exit door and into the exit teleport (''N'').
  
 
===Secrets===
 
===Secrets===
# From the start, continue right along the ledge until you reach the far side of the building. At the very end, there is a very thin, circular walkway that eventually leads to a shotgun. Upon picking up the shotgun, a hole in the wall behind you opens up, unleashing some Cacodemons. You can fall into this hole from the platform you're on (which will gradually rise) and get the secret items there.
+
====Official====
# Drop into the slime in the main area and take any of the teleporters down there. You will be taken to the top of a tall red pillar, with several more beneath you. Run along down the pillars until you reach a platform with a teleporter on it. Go through to be taken to an otherwise unreachable area. Follow the hall to the right around a bend and flip the switch there. Return the way you came and take the first right at the end of the hall. Follow the path to another switch and press that one. Follow the remaining hall to a third switch. Press it to open a teleporter taking you back to the main area. Drop back down into the slime and take the teleporter back up to the first red pillar. This time, run across the next three and back onto the ledge you started the level on. The switches you pushed in the hidden area have caused a set of stairs to raise, allowing you to enter the previously unaccessible central building.
+
# From the start, continue right along the ledge until you reach the far side of the building. At the very end, there is a very thin, circular walkway that eventually leads to a shotgun. Upon picking up the shotgun, a hole in the wall behind you opens up, unleashing some cacodemons (''O''). You can fall into this hole from the platform you're on (which will gradually rise) and get the secret items there. ('''sector 123''')
# Inside the central building (secret #2), there is a raised computer on the right wall near the entrance. Press the use key against it to lower an elevator behind you that will take you to a secret ammo stash.
+
# Drop into the slime in the main area and take any of the teleporters down there (''P''). You will be taken to the top of a tall red pillar, with several more beneath you. Run along down the pillars until you reach a platform with a teleporter on it (''Q''). Go through to be taken to an otherwise unreachable area. Follow the hall to the right around a bend and flip the switch there. Return the way you came and take the first right at the end of the hall. Follow the path to another switch and press that one. Follow the remaining hall to a third switch (''R''). Press it to open a teleporter taking you back to the main area (''S''). Drop back down into the slime and take the teleporter back up to the first red pillar. This time, run across the next three and back onto the ledge you started the level on. The switches you pushed in the hidden area have caused a set of stairs to raise, allowing you to enter the previously inaccessible central building (''T''). ('''sector 98''')
# After passing through the blue door, you'll be faced with a series of extremely thin walkways across a slime pit. From the blue door, go straight, take a right at the intersection, and after turning left continue straight until you reach the area where the walkway forms a square. Inside this square is a raised platform with an invulnerability sphere. Drop onto this platform. To escape safely, stand at one of the edges of the platform and press the use key. This causes the platform to raise a little. You can do this as many times as you need to get out. If you fall into the area between the platform and the thin walkway, you can press the use key against the outer walls to raise that floor as well.
+
# Inside the central building (secret #2), there is a raised computer on the right wall near the entrance. Press the use key against it to lower an elevator behind you that will take you to a secret ammo stash (''U''). ('''sector 116''')
 +
# After passing through the blue door, you'll be faced with a series of extremely thin walkways across a slime pit (''V''). From the blue door, go straight, take a right at the intersection, and after turning left continue straight until you reach the area where the walkway forms a square. Inside this square is a raised platform with an invulnerability sphere (''W''). Drop onto this platform. ('''sector 62''') To escape safely, stand at one of the edges of the platform and press the use key (''X''). This causes the platform to raise a little. You can do this as many times as you need to get out. If you fall into the area between the platform and the thin walkway, you can press the use key against the outer walls to raise that floor as well.
 +
 
 +
====Non-official====
 +
#In the slime pit to the west of the building with the blue keycard, there is a cave that contains a BFG, a radiation suit, ammo, and some monsters.
 +
 
 +
===Bugs===
 +
If you time it right when you raise both the middle and the outer platforms, the floor in the middle of the loop where the invulnerability sphere is will go down forever, forming an inescapable pit, though the lowering floor will eventually cause a [[Numeric overflow crash in tall areas|crash]].
  
==Speedrunning==
+
== Areas / screenshots ==
 +
<gallery mode=nolines widths=160px>
 +
MAP24 start.png|Start
 +
MAP24 cacotrap.png|Your first equilibristic attempt on this map
 +
MAP24 massacre.png|A massacre in the control room
 +
MAP24 ledges.png|Narrow, long ledges - this level is all about them
 +
MAP24 cross.png|A crucifix-shaped platform
 +
MAP24 blueroom.png|An ambush in the water supply room
 +
MAP24 end.png|Take extra special care here - if you stumble, you are done for
 +
</gallery>
  
 +
== Speedrunning ==
 
===Routes and tricks===
 
===Routes and tricks===
 +
There is a possible way of completing this level without the blue key. The way to do so is by going around to the other door that leads into the area on the other side of the wall that contains the door with the blue coded door, go towards the far area that is near the alcove that holds a radiation suit and look for a teleporter that is nearby, enter one of the teleports and be teleported onto the alcove, then you can run and leap onto one of the pathways, but this can be quite challenging since the paths are fairly thin. Now, carefully walk across the path and look for the teleporter with the hanging corpse and then you can be teleported to the area that contains the exit, but you will need to have the red key to exit, regardless.
 +
 +
===Current records===
 +
The [[Compet-n]] records for the map are:
  
===Records===
 
The [[Compet-N]] records for the map are:
 
 
{| {{prettytable}}
 
{| {{prettytable}}
!Run||Time||Player||Date||File||Notes
+
! Run !! Time !! Player !! Date !! File !! Notes
 
|-
 
|-
|[[UV speed]]||00:33||[[Marijo "Sedlo" Sedlic]]||2004-01-23||{{competnftp|doom2/speed/lv24-033.zip|lv24-033.zip}}||
+
|[[UV speed]]||00:32||[[Looper]]||2011-08-20||{{competnftp|doom2/speed/pa24-032.zip|pa24-032.zip}}||
 
|-
 
|-
|[[NM speed]]||00:53||[[Xit Vono]]||2002-07-28||{{competnftp|doom2/nmare/nm24-053.zip|nm24-053.zip}}||
+
|[[NM speed]]||00:53||[[Jim Leonard (Xit Vono)]]||2002-07-28||{{competnftp|doom2/nmare/nm24-053.zip|nm24-053.zip}}||
 
|-
 
|-
|[[UV max]]||05:14||[[Radek Pecka]]||2002-06-27||{{competnftp|doom2/max/lv24-514.zip|lv24-514.zip}}||
+
|[[UV max]]||04:17||[[Looper]]||2011-10-22||{{competnftp|doom2/max/lv24-417.zip|lv24-417.zip}}||
 
|-
 
|-
 
|[[NM100S]]||02:17||[[Radek Pecka]]||2004-03-31||{{competnftp|doom2/nm100s/ns24-217.zip|ns24-217.zip}}||
 
|[[NM100S]]||02:17||[[Radek Pecka]]||2004-03-31||{{competnftp|doom2/nm100s/ns24-217.zip|ns24-217.zip}}||
Line 39: Line 60:
 
|[[UV -fast]]||05:34||[[Radek Pecka]]||2002-09-14||{{competnftp|doom2/fast/fa24-534.zip|fa24-534.zip}}||
 
|[[UV -fast]]||05:34||[[Radek Pecka]]||2002-09-14||{{competnftp|doom2/fast/fa24-534.zip|fa24-534.zip}}||
 
|-
 
|-
|[[UV -respawn]]||05:07||[[Henning Skogsto]]||1998-09-24||{{competnftp|doom2/respawn/re24-507.zip|re24-507.zip}}||
+
|[[UV -respawn]]||05:07||[[Henning Skogstø]]||1998-09-24||{{competnftp|doom2/respawn/re24-507.zip|re24-507.zip}}||
 
|-
 
|-
|[[UV Tyson]]||08:54||[[Radek Pecka]]||2004-02-03||{{competnftp|doom2/tyson/ty24-854.zip|ty24-854.zip}}||
+
|[[UV Tyson]]||08:41||[[Jim Leonard (Xit Vono)]]||2006-02-02||{{competnftp|doom2/tyson/ty24-841.zip|ty24-841.zip}}||
 
|-
 
|-
|[[UV pacifist]]||00:33||[[Marijo "Sedlo" Sedlic]]||2004-01-23||{{competnftp|doom2/speed/lv24-033.zip|lv24-033.zip}}||
+
|[[UV pacifist]]||00:32||[[Looper]]||2011-08-20||{{competnftp|doom2/pacifist/pa24-032.zip|pa24-032.zip}}||
 
|}
 
|}
  
==Statistics==
+
''The data was last verified in its entirety on July 5, 2020.''
 +
 
 +
== Deathmatch ==
 +
 
 +
===Player spawns===
 +
This level contains six spawn points:
 +
# facing north. ('''thing 4''')
 +
# facing south-west. ('''thing 347''')
 +
# facing south-east. ('''thing 348''')
 +
# facing north. ('''thing 349''')
 +
# facing south-west. ('''thing 350''')
 +
# facing south. ('''thing 351''')
 +
 
 +
== Statistics ==
 
===Map data===
 
===Map data===
{| {{prettytable}}
+
{{mapdata|
|[[Things]]||364
+
  things=364|
 +
  vertexes=1174|
 +
  linedefs=1109|
 +
  sidedefs=1701|
 +
  sectors=181|
 +
  vertexbefore=943}}
 +
 
 +
===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;"|[[Heavy weapon dude]]||11||19||25
 +
|-
 +
|style="text-align: left;"|[[Imp]]||15||29||46
 +
|-
 +
|style="text-align: left;"|[[Lost soul]]||3||8||16
 +
|-
 +
|style="text-align: left;"|[[Demon]]||16||37||56
 +
|-
 +
|style="text-align: left;"|[[Spectre]]||0||2||8
 +
|-
 +
|style="text-align: left;"|[[Cacodemon]]||2||5||8
 +
|-
 +
|style="text-align: left;"|[[Hell knight]]||3||6||6
 +
|-
 +
|style="text-align: left;"|[[Mancubus]]||1||2||2
 +
|-
 +
![[Weapon|Weapons]]!!1-2!!3!!4-5
 +
|-
 +
|style="text-align: left;"|[[Shotgun]]||colspan="3"|1
 +
|-
 +
|style="text-align: left;"|[[Super shotgun]]||colspan="3"|1
 +
|-
 +
|style="text-align: left;"|[[Rocket launcher]]||colspan="3"|1
 +
|-
 +
|style="text-align: left;"|[[Plasma gun]]||colspan="3"|1
 +
|-
 +
|style="text-align: left;"|[[BFG9000]]||colspan="3"|1
 +
|-
 +
![[Ammo|Ammunition]]!!1-2!!3!!4-5
 +
|-
 +
|style="text-align: left;"|[[Clip]]||colspan="3"|10
 +
|-
 +
|style="text-align: left;"|[[Box of bullets]]||colspan="3"|5
 +
|-
 +
|style="text-align: left;"|[[4 shotgun shells]]||colspan="3"|15
 +
|-
 +
|style="text-align: left;"|[[Box of shotgun shells]]||4||5||5
 +
|-
 +
|style="text-align: left;"|[[Rocket]]||27||28||28
 +
|-
 +
|style="text-align: left;"|[[Box of rockets]]||colspan="3"|9
 +
|-
 +
|style="text-align: left;"|[[Energy cell (Doom)|Energy cell]]||colspan="3"|3
 +
|-
 +
![[Item#Doom games|Health & Armor]]!!1-2!!3!!4-5
 +
|-
 +
|style="text-align: left;"|[[Stimpack]]||colspan="3"|19
 +
|-
 +
|style="text-align: left;"|[[Medikit]]||colspan="3"|11
 +
|-
 +
|style="text-align: left;"|[[Armor]]||colspan="3"|1
 +
|-
 +
!Items!!1-2!!3!!4-5
 +
|-
 +
|style="text-align: left;"|[[Armor bonus]]||colspan="3"|18
 +
|-
 +
|style="text-align: left;"|[[Health bonus]]||colspan="3"|26
 +
|-
 +
|style="text-align: left;"|[[Megasphere]]||colspan="3"|2
 +
|-
 +
|style="text-align: left;"|[[Backpack]]||colspan="3"|1
 +
|-
 +
|style="text-align: left;"|[[Berserk]]||colspan="3"|2
 +
|-
 +
|style="text-align: left;"|[[Invulnerability]]||colspan="3"|1
 +
|-
 +
|style="text-align: left;"|[[Radiation shielding suit]]||colspan="3"|7
 +
|-
 +
![[Key|Keys]]!!1-2!!3!!4-5
 
|-
 
|-
|[[Vertices]]||1174
+
|style="text-align: left;"|Blue keycard||colspan="3"|1
 
|-
 
|-
|[[Linedefs]]||1109
+
|style="text-align: left;"|Red keycard||colspan="3"|1
 
|-
 
|-
|[[Sidedefs]]||1701
+
!Miscellaneous!!1-2!!3!!4-5
 
|-
 
|-
|[[Sectors]]||181
+
|style="text-align: left;"|[[Teleporter|Teleport landing]]||colspan="3"|9
 
|}
 
|}
 
+
{{col-break}}
===Things===
+
{| {{prettytable|style=text-align: center;}}
{| {{prettytable}}
+
!colspan="4"|Multiplayer
!Monsters||[[I'm Too Young To Die|ITYTD]] and [[Hey, Not Too Rough|HNTR]]||[[Hurt Me Plenty|HMP]]||[[Ultra-Violence|UV]] and [[Nightmare!|NM]]
+
|-
 +
!Monsters!!1-2!!3!!4-5
 +
|-
 +
|style="text-align: left;"|Heavy weapon dude||11||19||25
 +
|-
 +
|style="text-align: left;"|Imp||15||29||46
 +
|-
 +
|style="text-align: left;"|Lost soul||3||8||16
 +
|-
 +
|style="text-align: left;"|Demon||16||37||56
 +
|-
 +
|style="text-align: left;"|Spectre||0||2||8
 
|-
 
|-
|[[Spectre]]s||0||2||8
+
|style="text-align: left;"|Cacodemon||2||5||8
 
|-
 
|-
|[[Imp]]s||15||29||46
+
|style="text-align: left;"|Hell knight||3||6||6
 
|-
 
|-
|[[Demon]]s||16||37||56
+
|style="text-align: left;"|Mancubus||1||2||2
 
|-
 
|-
|[[Cacodemon]]s||2||5||8
+
!Weapons!!1-2!!3!!4-5
 
|-
 
|-
|[[Lost Soul]]s||3||8||16
+
|style="text-align: left;"|Shotgun||colspan="3"|1
 
|-
 
|-
|[[Chaingunner]]s||11||19||25
+
|style="text-align: left;"|Super shotgun||colspan="3"|1
 
|-
 
|-
|[[Mancubus|Mancubi]]||1||2||2
+
|style="text-align: left;"|[[Chaingun]]||colspan="3"|2
 
|-
 
|-
|[[Hell Knight]]s||3||6||6
+
|style="text-align: left;"|Rocket launcher||colspan="3"|1
 
|-
 
|-
!Powerups||ITYTD and HNTR||HMP||UV and NM
+
|style="text-align: left;"|Plasma gun||colspan="3"|1
 
|-
 
|-
|[[Backpack]]s||1||1||1
+
|style="text-align: left;"|BFG9000||colspan="3"|2
 
|-
 
|-
|[[Stim pack]]s||19||19||19
+
!Ammunition!!1-2!!3!!4-5
 
|-
 
|-
|[[Medikit]]s||11||11||11
+
|style="text-align: left;"|Clip||colspan="3"|10
 
|-
 
|-
|[[Health bonus]]es||26||26||26
+
|style="text-align: left;"|Box of bullets||colspan="3"|5
 
|-
 
|-
|[[Armor bonus]]es||18||18||18
+
|style="text-align: left;"|4 shotgun shells||colspan="3"|15
 
|-
 
|-
|[[Green armor]]s||1||1||1
+
|style="text-align: left;"|Box of shotgun shells||4||5||5
 
|-
 
|-
|[[Invulnerability|Invulnerabilities]]||1||1||1
+
|style="text-align: left;"|Rocket||27||28||28
 
|-
 
|-
|[[Berserk]]s||2||2||2
+
|style="text-align: left;"|Box of rockets||colspan="3"|9
 
|-
 
|-
|[[Radiation suit]]s||7||7||7
+
|style="text-align: left;"|Energy cell||colspan="3"|3
 
|-
 
|-
|[[Megasphere]]||2||2||2
+
!Health & Armor!!1-2!!3!!4-5
 
|-
 
|-
!Weapons||ITYTD and HNTR||HMP||UV and NM
+
|style="text-align: left;"|Stimpack||colspan="3"|19
 
|-
 
|-
|[[Shotgun]]s||1||1||1
+
|style="text-align: left;"|Medikit||colspan="3"|11
 
|-
 
|-
|[[Rocket launcher]]s||1||1||1
+
|style="text-align: left;"|Armor||colspan="3"|1
 
|-
 
|-
|[[Plasma gun]]s||1||1||1
+
!Items!!1-2!!3!!4-5
 
|-
 
|-
|[[BFG 9000]]s||1||1||1
+
|style="text-align: left;"|Armor bonus||colspan="3"|18
 
|-
 
|-
|[[Super shotgun]]s||1||1||1
+
|style="text-align: left;"|Health bonus||colspan="3"|26
 
|-
 
|-
!Ammunition||ITYTD and HNTR||HMP||UV and NM
+
|style="text-align: left;"|Megasphere||colspan="3"|2
 
|-
 
|-
|[[Ammo clip]]s||10||10||10
+
|style="text-align: left;"|Backpack||colspan="3"|1
 
|-
 
|-
|[[Shell]]s||15||15||15
+
|style="text-align: left;"|Berserk||colspan="3"|2
 
|-
 
|-
|[[Rocket]]s||27||28||28
+
|style="text-align: left;"|Invulnerability||colspan="3"|1
 
|-
 
|-
|[[Box of rockets|Rocket boxes]]||9||9||9
+
|style="text-align: left;"|Radiation shielding suit||colspan="3"|7
 
|-
 
|-
|[[Energy cell]]s||3||3||3
+
!Keys!!1-2!!3!!4-5
 
|-
 
|-
|[[Box of ammo|Ammo boxes]]||5||5||5
+
|style="text-align: left;"|Blue keycard||colspan="3"|1
 
|-
 
|-
|[[Box of shells|Shell boxes]]||4||5||5
+
|style="text-align: left;"|Red keycard||colspan="3"|1
 
|-
 
|-
!Keys||ITYTD and HNTR||HMP||UV and NM
+
!Miscellaneous!!1-2!!3!!4-5
 
|-
 
|-
|[[Blue card]]s||1||1||1
+
|style="text-align: left;"|[[Multiplayer#Cooperative|Cooperative start]]||colspan="3"|4
 
|-
 
|-
|[[Red card]]s||1||1||1
+
|style="text-align: left;"|[[Deathmatch start]]||colspan="3"|6
 
|-
 
|-
 +
|style="text-align: left;"|Teleport landing||colspan="3"|9
 
|}
 
|}
 +
{{col-end}}
 +
 +
==Inspiration and development==
 +
According to designer Sandy Petersen, this map was inspired by a nightmare he had in which he was navigating a network of walkways and narrow bridges over deep, dark chasms.{{cite web|author=Saral, Mahmut|title=An interview with legendary Sandy Petersen (Call of Cthulhu, Doom, Quake, Age of Empires and much more!)|url=https://donanimgunlugu.com/efsane-sandy-petersen-ile-roportaj-192559/2|publication=Donanım Günlüğü|publishdate=5 December 2018|accessdate=8 December 2018}}
 +
 +
==Trivia==
 +
{{French level name|Le Gouffre}}
 +
 +
== External links ==
 +
* {{competnmap|2|225|MAP24}}
 +
* {{dsda|id=945|mapid=224|title=MAP24 demos}}
 +
* [http://ian-albert.com/games/doom_2_maps/ Top-down perspective view of all Doom II levels] by Ian Albert
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==References==
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<references />
  
==External links==
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[[Category:Sandy Petersen levels]]
* [http://www.doom2.net/compet-n/database/cn.cgi?map:doom2:24 MAP24 demos from the Compet-N database]
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[[Category:Levels with extra equipment in co-op]]
[[Category:Levels]]
 
[[Category:MAP24]]
 

Revision as of 09:25, 5 July 2020

Doom II maps 21-30

01 02 03 04 05 06 07 08 09 10 11
12 13 14 15 16 17 18 19 20
(21 - 30)
Secret maps: 31 32

This level occupies the map slot MAP24. For other maps which occupy this slot, see Category:MAP24.

MAP24: The Chasm is the twenty-fourth map of Doom II. It was designed by Sandy Petersen and uses the music track "In The Dark". The par time is 2:30. As the name suggests, it is a large underground cavern with nukage-filled chasms and numerous thin walkways to move about.

Walkthrough

Map of The Chasm
Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.

Essentials

Carefully walk across the winding walkway (A) sprawling in front of you at the beginning of the level. Enter the building at the end (B). Inside, explore the maze-like interior, killing enemies along the way to clear your path. Once you pick up the blue keycard in the northwest corner of the building (C), return to the starting point.

Continue to follow the ledge around to the west, towards the blue door (D). Behind it are a series of extremely thin ledges (E). Walk straight ahead through the intersection and around to the plasma rifle. Upon picking it up, the floor inside the square will rise. After killing the cacodemons, continue along the narrow ledge and take the next right. Walk around the next square walkway to the left, picking up the items on the central platform (F). This causes the floor to raise again. Once the cacodemon has been killed, head north towards the platform with the hanging corpse dangling above it (G), and you'll be teleported to a new area.

Proceed along the path and take a left at the branch. You'll arrive at two teleporters. Take the right (H) one to be transported to a pulsating blue room. In this next room, kill the demons lurking about. Drop down into the center of this room and flip the skull switch to the east (I). This causes a platform in the west to lower, so run over, ride it back up, and flip the second skull switch (J). This one lowers a platform in the north, so once again run onto it before it raises and flip the skull switch (K). This will lower the red keycard directly in front of you (L). Pick it up and exit this area by flipping the switch in the south and walking through the teleporter.

Once you're back in the previous area, walk along the ledge towards the red door. Be careful, as there's no way to escape the slime pit here. Go through the red door and the door directly behind it (M), through the exit door and into the exit teleport (N).

Secrets

Official

  1. From the start, continue right along the ledge until you reach the far side of the building. At the very end, there is a very thin, circular walkway that eventually leads to a shotgun. Upon picking up the shotgun, a hole in the wall behind you opens up, unleashing some cacodemons (O). You can fall into this hole from the platform you're on (which will gradually rise) and get the secret items there. (sector 123)
  2. Drop into the slime in the main area and take any of the teleporters down there (P). You will be taken to the top of a tall red pillar, with several more beneath you. Run along down the pillars until you reach a platform with a teleporter on it (Q). Go through to be taken to an otherwise unreachable area. Follow the hall to the right around a bend and flip the switch there. Return the way you came and take the first right at the end of the hall. Follow the path to another switch and press that one. Follow the remaining hall to a third switch (R). Press it to open a teleporter taking you back to the main area (S). Drop back down into the slime and take the teleporter back up to the first red pillar. This time, run across the next three and back onto the ledge you started the level on. The switches you pushed in the hidden area have caused a set of stairs to raise, allowing you to enter the previously inaccessible central building (T). (sector 98)
  3. Inside the central building (secret #2), there is a raised computer on the right wall near the entrance. Press the use key against it to lower an elevator behind you that will take you to a secret ammo stash (U). (sector 116)
  4. After passing through the blue door, you'll be faced with a series of extremely thin walkways across a slime pit (V). From the blue door, go straight, take a right at the intersection, and after turning left continue straight until you reach the area where the walkway forms a square. Inside this square is a raised platform with an invulnerability sphere (W). Drop onto this platform. (sector 62) To escape safely, stand at one of the edges of the platform and press the use key (X). This causes the platform to raise a little. You can do this as many times as you need to get out. If you fall into the area between the platform and the thin walkway, you can press the use key against the outer walls to raise that floor as well.

Non-official

  1. In the slime pit to the west of the building with the blue keycard, there is a cave that contains a BFG, a radiation suit, ammo, and some monsters.

Bugs

If you time it right when you raise both the middle and the outer platforms, the floor in the middle of the loop where the invulnerability sphere is will go down forever, forming an inescapable pit, though the lowering floor will eventually cause a crash.

Areas / screenshots

Speedrunning

Routes and tricks

There is a possible way of completing this level without the blue key. The way to do so is by going around to the other door that leads into the area on the other side of the wall that contains the door with the blue coded door, go towards the far area that is near the alcove that holds a radiation suit and look for a teleporter that is nearby, enter one of the teleports and be teleported onto the alcove, then you can run and leap onto one of the pathways, but this can be quite challenging since the paths are fairly thin. Now, carefully walk across the path and look for the teleporter with the hanging corpse and then you can be teleported to the area that contains the exit, but you will need to have the red key to exit, regardless.

Current records

The Compet-n records for the map are:

Run Time Player Date File Notes
UV speed 00:32 Looper 2011-08-20 pa24-032.zip
NM speed 00:53 Jim Leonard (Xit Vono) 2002-07-28 nm24-053.zip
UV max 04:17 Looper 2011-10-22 lv24-417.zip
NM100S 02:17 Radek Pecka 2004-03-31 ns24-217.zip
UV -fast 05:34 Radek Pecka 2002-09-14 fa24-534.zip
UV -respawn 05:07 Henning Skogstø 1998-09-24 re24-507.zip
UV Tyson 08:41 Jim Leonard (Xit Vono) 2006-02-02 ty24-841.zip
UV pacifist 00:32 Looper 2011-08-20 pa24-032.zip

The data was last verified in its entirety on July 5, 2020.

Deathmatch

Player spawns

This level contains six spawn points:

  1. facing north. (thing 4)
  2. facing south-west. (thing 347)
  3. facing south-east. (thing 348)
  4. facing north. (thing 349)
  5. facing south-west. (thing 350)
  6. facing south. (thing 351)

Statistics

Map data

Things 364
Vertices 1174*
Linedefs 1109
Sidedefs 1701
Sectors 181
* The vertex count without the effect of node building is 943.

Things

This level contains the following numbers of things per skill level:

Inspiration and development

According to designer Sandy Petersen, this map was inspired by a nightmare he had in which he was navigating a network of walkways and narrow bridges over deep, dark chasms.[1]

Trivia

The official French name of this level is Le Gouffre.

External links

References

  1. Saral, Mahmut (5 December 2018). "An interview with legendary Sandy Petersen (Call of Cthulhu, Doom, Quake, Age of Empires and much more!)." Donanım Günlüğü. Retrieved 8 December 2018.