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Doom II: Hell on Earth (PC)/Revisional Differences

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This is a sub-page of Doom II: Hell on Earth (PC).


Seven official DOS versions of Doom II exist:

  • v1.666 The initial release version. Of note is the German version of v1.666, that uses a different executable and its copy of DOOM2.WAD omits the MAP31 and MAP32 secret levels.
  • v1.7
  • v1.7a only changes the phone number listed on the ENDOOM text screen displayed in DOS after exiting the game.
  • v1.8 In addition, The French version of v1.8 had received a full translation.
  • v1.9
  • v1.10 (Linux Doom) is the version used for the official source code release. This version was ported to Linux by Dave D. Taylor and "cleaned up" for public release by Bernd Kreimeier. This version is the basis for essentially all fan-made source ports.
  • v1.11 (Doom Classic) is used for the Xbox, Xbox 360, Doom 3 BFG Edition, and PSN Doom Classic Complete versions of the game.

In addition to these, there is also a bootleg copy of 1.666 which was leaked prior to the official release of the game, which the upgrade patches are not compatible with, but has no known differences with the official 1.666 release. The 1.3 through 1.6 beta versions of Doom also have partial Doom II support, as the game was in development when those betas were published.


  • Version 1.7 fixes the Soundblaster/Adlib music crash.
  • Versions of the engine not running on DOS or Linux support higher resolutions than 320x200.
  • The "Doom Classic" engine used for the Xbox Live Arcade release, later re-used for Doom 3: BFG Edition and Doom Classic Complete, increases several of the engine's internal limits in order to support the new No Rest For The Living expansion, which has significantly more detailed maps than the original engine can run.
  • These limits were further increased in the January 2020 patch for the 2019 re-releases, in order to better support the curated custom content (specifically John Romero's SIGIL, which goes beyond even BFG's expanded limits).


To do:
Enemy and possible item differences between revisions.

Level 1: Entryway

v1.666 - v1.7a, v1.9 v1.8
Doom2-MAP01 flats1 17a.png Doom2-MAP01 flats1 18.png
v1.666 - v1.7a, v1.9 v1.8
Doom2-MAP01 flats2 17a.png Doom2-MAP01 flats2 18.png

For whatever reason, the entire map was shifted southwest, closer to the 0, 0 coordinate, in version 1.8. As a result of this, some flats became unaligned. The map was shifted again in version 1.9 to fix the flat alignment. Things were also shifted, but not by the same amounts, meaning they have slightly different positions in relation to the map geometry in each version.

Level 2: Underhalls

v1.666 v1.7 onward
Strangely these bars are still present in the GBA port/remake. Doom2-MAP02 bars 19.png

In v1.666, there was a door made of silver bars which blocked the alcove with the switch that opens the western half of the map, similar to the red key bars that remain in the opposite alcove. These were removed in v1.7 and a monster blocking line was put in their place to keep the shotgun guy contained.

v1.666 - v1.7a, v1.9 v1.8
Doom2-MAP02 teleporter 17a.png Doom2-MAP02 teleporter 18.png
Doom2-MAP02 stuck 18.png

Like Level 1, the entire map was shifted southwest to be closer to the 0, 0 coordinate in v1.8. And once again, some flats became unaligned, the most obvious being the secret teleporter. This was fixed in 1.9.

Things were shifted too, with hilarious results as several enemies ended up stuck in the walls. These were also mostly corrected for v1.9, with the exception of a single shotgun guy and a barrel who are still stuck in a wall near the blue key.

Level 3: The Gantlet

This was probably intended to make the level flow a bit better in deathmatch; it's really out of the way in singleplayer.

A new secret area was added to the room with the blue armor and shotgun in v1.9. It contains a teleporter to a small room with a backpack and door to the central area.

Level 5: The Waste Tunnels

In v1.9, the lift near the start that drops the player into the dark tunnel can be activated from inside the tunnel.

Entering the area to the right of the lift that drops you into the tunnel closes the door behind you. It can be reopened with a switch in the alcove closest to the door. Originally, entering the room with the mega-armor would also close this door. Since the door switch is one-time use, this was basically a trap and the player would be forced to leave this area through a tougher section of the map. This was changed in 1.9 so that entering the mega-armor room doesn't close the door.

Level 6: The Crusher

The 2019 re-release of the game removed the linedef actions from the door track of the red key door, which could crash the game if interacted with.

Level 11: Circle of Death / The 'O' of Destruction!

Doom2-MAP11 arachnotron 1666.png

A hard difficulty Arachnotron was originally stuck in a wall in the outside section right before the first arch-vile of the game. It was finally freed in v1.9.

v1.666 - v1.8 v1.9
The switch releases some pain elementals in all versions, too. The jump was never really that hard, but this makes the level flow a lot better.

The area around the switch that grants the player the rocket launcher and entry into the final area of the map was modified in v1.9. Originally, all this switch did was lower the rocket launcher and the barrier preventing entry to the final area. The player was forced to find a switch in the nukage pit to get back up onto the central "O" structure, then run from the center of the "O" to jump across to the newly accessible ledge. This was made significantly easier with the addition of a new wall which lowers alongside the rocket launcher and barrier, and allows the player to walk over to the ledge leading to the final area rather than having to make a tough jump.

Level 14: The Inmost Dens

v1.666 v1.7 onward
Doom2-MAP14 crusher 1666.png Doom2-MAP14 crusher 19.png

The ceiling in the crusher room with the rocket launcher has been raised by 32 units in v1.7. This reveals a missing upper texture.

Near the center of the map there is a set of door and lift bars which open as the player runs towards them. In v1.666, the trigger lines for these were closer together than in 1.7.

Level 15: Industrial Zone

A single zombieman located to the northeast of the central tower was removed from this map in v1.7.

Level 17: Tenements

The spectres stuck inside of each other never got fixed, though.

The teleporter in the lava pit with the caged arch-vile originally did nothing in single player and teleported the player to the dark cave area near the yellow skull in multiplayer. In v1.7, the teleporter was changed to teleport to the central pillar with the supercharge instead.

Level 18: The Courtyard

v1.666 v1.7 onward
How do you miss something like this?! Doom2-MAP18 line 17a.png

There was an entire linedef missing from one of the metal boxes near the yellow skull in v1.666, which was fixed in 1.7.

Level 24: The Chasm

v1.666 v1.7 onward
This, on the other hand, is pretty easy to miss. Doom2-MAP24 teleporter 19.png

The back side of the lift which lowers to reveal the teleporter out of the red skull room was originally untextured. This was fixed in 1.7.

Level 25: Bloodfalls

The blood pillar with a revenant on top could only be lowered from the side closest to the lift in v1.666. V1.7 made it so it could be activated from all sides.

v1.666 v1.7 onward
And American McGee claims he never liked brown. Doom2-MAP25 lift 19.png

The lift near the blood pillar originally used the same tan stone as the surrounding walls. It was replaced with a gray stone texture in 1.7, making the lift more obvious.

Doom2-MAP25 bluedoor 19.png

The blue door was highlighted with a bright, blinking light in v1.7.

v1.666 v1.7 onward
Doom2-MAP25 textures 1666A.png Doom2-MAP25 textures 19A.png
v1.666 v1.7 onward
Doom2-MAP25 textures 1666B.png Doom2-MAP25 textures 19B.png

Some walls in the side rooms before the metal room with the megasphere have had their textures changed to match the surrounding walls in v1.7.

Every version from 1.7 onward and 1.666 German have 2 secrets in this map.

Level 28: The Spirit World

Three deathmatch spawns were added in v1.7. The one in the scrolling spine room was moved slightly.

Level 29: The Living End

Co-op starts were added in v1.7.

Level 31: Wolfenstein / IDKFA

All secret areas were updated to count towards the secret total in v1.9.

This level has been renamed "IDKFA" in Doom 3: BFG Edition and Doom Classic Complete. The Wolfenstein SS enemies have been replaced by zombiemen: Since the XBLA and Doom 3: BFG Edition versions of Doom II can play network games with one another, this will cause the game to de-sync in this level. As of the January 2020 patch for the 2019 re-release, the Wolfenstein SS enemies have been restored to their original locations.

Level 32: Grosse / Keen

Like in level 31, the four pillars that can be raised to reveal goodies, along with the two side areas, were updated to count towards the secret total in v1.9.

This level has been renamed "Keen" in Doom 3: BFG Edition and Doom Classic Complete. Like level 31, the Wolfenstein SS enemies have been replaced by zombiemen, and this will cause desyncs when playing with the XBLA version. As of the January 2020 patch for the 2019 re-release, the Wolfenstein SS enemies have been restored to their original locations.

Level 33: Betray

Not that great as a level, but a pretty cool Easter egg.

When the classic Doom games were ported to the Xbox as part of the Collectors Edition of Doom 3, the programmers responsible decided to slip in a couple of ancient levels they made back in the day. The included version of Doom II contains Betray, a 1995 level by Michael Bukowski.

In level 2, grab the red keycard, drop down, and enter the northeast chamber that has just opened up. Walk up to the narrow, stone wall in the northwest of this chamber, and press on it to be sent to Betray. Once you complete it, you'll be sent ahead to level 3.

(Source: ClassicDoom.com)

This map is still included within the IWAD in the Xbox Live Arcade, Doom 3: BFG Edition, and Doom Classic Complete versions of Doom II. The exit that leads to it was removed in the console versions, making it unused. Interestingly, the exit is present in the version of Doom II included in the PC version of Doom 3: BFG Edition, but the code to go to level 33 is not, so it will either take the player back to level 1 or restart level 2, depending on which level the game was started on.

No Rest For The Living

The Xbox Live Arcade, Doom 3: BFG Edition, and PSN Doom Classic Complete ports of Doom II feature a new nine level expansion from Nerve Software. Strings for its level name and end text have been added to the executable, along with code to make its secret exit in level 5 function. Additionally, its PWAD contains new intermission map name graphics.

To do:
What about PSN?
Level XBLA Music
1 Message For The Archvile
2 The Dave D. Taylor Blues
4 Shawn's Got The Shotgun
5 Into Sandy's City
7 Into Sandy's City
8 Shawn's Got The Shotgun
9 The Dave D. Taylor Blues

This expansion has its own music track assignments in the XBLA version. Doom 3: BFG Edition reuses the standard Doom II track assignments, and as a result, only level 6 plays the same music in both versions.

The 2019 re-release of Doom 2 lets you download No Rest For The Living as an official add-on. It adds a DMAPINFO lump defining level metadata (name etc.), allowing it to use the track assignments from the XBLA version and changing the sky graphic to SKY3 (the Hell sky) after the first three levels.


Title Screen

Original PC, Xbox Xbox Live Arcade BFG Edition, PSN
Doomiipctitlescreen.gif Doomii-XBLA-titlescreen.png Doom2-BFG-titlescreen.png
Unity 2019 (Switch, PS4, Xbox One) Unity 2020 (PC, Switch, PS4, Xbox One)
320px Doom2-Unity-titlescreen.png

For unspecified reasons, the TITLEPIC lump was removed from the Xbox Live Arcade version and subsequent versions afterwards, using the DMENUPIC lump as the title screen instead (in the Xbox Live Arcade version), but used the INTERPIC lump as the title screen in the BFG Edition and the PlayStation Network releases.

When the 2019 Unity re-release was initially released, the original title screen is similar to the XBLA release, using the same DMENUPIC lump but without the brown filter and larger logo. The proper title screen was restored and extended for widescreen later in 2020 with the help of community members, albeit with the id Software logo and copyright excised.

Credits Screen

Original (DOS, PC) Unity Multi-Platform Re-release
Doom2-CREDIT.png Doom2-Unity-CREDIT.png

More width space was used.

Controls Screen

Original (DOS, PC) Unity Multi-Platform Re-release
Doom2-HELP.png Doom2-Unity-HELP.png

Width was extended.

Intermission Screen

Unity 2019 (Switch, PS4, Xbox One) Unity 2020 (PC, Switch, PS4, Xbox One)
Doom2-INTERPIC.png Doom2-Unity-INTERPIC.png

Much like Doom episode 4's intermission screen, the only changes were that the skull faces were extended to each end of the screen.

End Screen

Unity 2019 (Switch, PS4, Xbox One) Unity 2020 (PC, Switch, PS4, Xbox One)
Doom2-BOSSBACK.png Doom2-Unity-BOSSBACK.png

Interestingly, not only was more width space was put in, but the extension also extended the tech wall much like the original textures do.

Red Crosses

Original PC, Xbox XBLA, BFG Edition, PSN PS4, Xbox One, Switch, PC (Bethesda.net)
Doom-STIMA0.png Doom-STIMA0BFG.png Doom2-Unity-STIMA0.png
Doom-MEDIA0.png Doom-MEDIA0BFG.png Doom2-Unity-MEDIA0.png
Doom-PSTRA0.png Doom-PSTRA0BFG.png Doom2-Unity-PSTRA0.png

Starting with the Xbox Live Arcade release of Doom II, the red crosses on the Stimpack, Medikit, and Berserk powerup were replaced by a red and white capsule. As of the January 2020 update for the 2019 re-release, the graphics have been re-replaced to use the original artwork but with a green cross instead of a red one. The overall changes to the health items were by and large done to avoid legal problems with the Red Cross Organization, who are infamously strict with the use of red crosses in media.

Wolfenstein Patches

Original PC, Xbox, XBLA BFG Edition, PSN PS4, Xbox One, Switch, PC (Bethesda.net)
Doom2-WOLF2.png Doom2-WOLF3.png Doom2-WOLF4.png Doom2-WOLF1.png Doom2-Unity-ZZWOLF2.png Doom2-Unity-ZZWOLF3.png Doom2-Unity-ZZWOLF4.png
Doom2-WOLF6.png Doom2-WOLF7.png Doom2-WOLF5.png Doom2-Unity-ZZWOLF6.png Doom2-Unity-ZZWOLF7.png
Doom2-WOLF14.png Doom2-WOLF17.png Doom2-WOLF13.png Doom2-Unity-ZZWOLF12.png Doom2-Unity-ZZWOLF13.png

The WOLF patches with Nazi symbols, used in the secret levels, were replaced with their blank wall equivalents in Doom 3: BFG Edition. As of the January 2020 patch for the 2019 re-release, the graphics have been re-replaced with modified versions of the original graphics - the Hitler portrait has had its mustache removed, and all swastikas have been replaced with a triangle emblem from the censored German release of Wolfenstein: The New Order.

All of the Wolfenstein SS enemy's sprites except for parts of the gibbing animation are replaced with poorly offset copies of the zombieman's first forward facing frame in the PC version of Doom 3: BFG Edition, but oddly not on Xbox 360. As of the January 2020 patch for the 2019 re-release, the Wolfenstein SS has been restored.

Menu Text

Original PC BFG Edition
Which Episode? Which expansion?
Knee-Deep in the Dead Hell on earth
The Shores of Hell No rest for the living
Screen Size Gamepad:
high Fullscreen:

Several menu strings were updated for the version included in Doom 3: BFG Edition. The previously unused episode selection graphics leftover from Doom are re-purposed for selecting which expansion to play. The updated engine removes the screen size and detail options, and graphics related to these were replaced with ones that read "Gamepad:" and "Fullscreen:".

change game
Are you sure?

Graphics have been added for a new menu, which is displayed instead of the original text strings when quitting the game. They allow you to accept/cancel quitting, or go back to the Doom 3 BFG Edition game selection screen. Interestingly, these are only present in the Doom 2 IWAD, despite also being used in The Ultimate Doom, meaning the engine always loads them from DOOM2.WAD.

Level Names

Original PC, Xbox, XBLA BFG Edition, PSN

New graphics obviously had to be made for the secret levels' new names in Doom 3: BFG Edition. The original names were restored in the 2019 re-release, but the graphics lumps in the WAD were not changed (as the names are now displayed using a sprite font in Unity's UI system).


Betray's name is also present in the Doom 3: BFG Edition IWAD.


Original PC, Xbox, XBLA, PS4, Xbox One, Switch, PC (Bethesda.net) BFG Edition, PSN

Evil Incarnate and Ultimate Conquest, the two music tracks based on ones from Spear of Destiny and Wolfenstein 3D, which are used in the secret levels and ending cast of characters, were replaced with copies of DOOM, the music played in levels 5 and 13, in Doom 3: BFG Edition. The 2019 re-release restores the original music since launch.

Original PC, Xbox, XBLA PS4, Xbox One, Switch, PC (Bethesda.net)

As of the January 2020 patch for the 2019 re-release, the Wolfenstein SS's sight sound has been partially redubbed (the first part is kept, the second part is voiced by Mike Rubits), so that they now say "schutzkämpfer" instead of "schutzstaffel". Their death voices remain the same.

(Source: Unofficial Change Log v1.01 (DOS Doom II differences))