Doom: Unity Edition is a source port of The Ultimate Doom in the Unity Engine. This is the version used on the various 8th gen ports. It was available at initial launch for the Sony PlayStation 4, Nintendo Switch, Microsoft Xbox One, the Google Play app store for Android, and Apple's iOS app store. As of the January 9, 2020 patch, support for PC has also been added, via the Bethesda.net distribution platform and Steam.
The version included in Doom Eternal is the Unity Edition as well, though it hasn't been updated to include the uncensored medkits ('pills' symbol is still seen) and uncensored versions of level 31: Wolfenstein and Level 32: Grosse.
Differences in Doom and Doom II
Note that many changes below are carried over from previous Doom Classic revisions.
Ultimate Doom and Doom II
- Local multiplayer is available.
- Cheat codes are only available and accessible via the Options menu.
- There is no confirmation when selecting Nightmare! skill.
- On Nightmare!, the fast monsters mechanic has been removed entirely: fireballs shot by imps, cacodemons, barons of Hell and Hell knights are no longer sped up, and neither is the running speed of demons. Monsters retain increased reaction times.Template:Cite webTemplate:Cite web
- The pickup sprites for the stimpack, medikit, and berserk (STIMA0, MEDIA0, PSTRA0) are modified in compliance with the Red Cross' wish that its symbol not be used in games. Initially the pill graphics from previous Doom Classic versions were reused. This was later changed in the January 9, 2020 update (see below).
- The DMENUPIC that was the title screen in the original Xbox 360 version is used here.
- New to the port is the addition of creative credits that resemble the ending credit sequence of Doom (2016), where various levels and battles are shown briefly while the camera pans around and showing the names of Nerve Software key staff. Doom and Doom II each have their own sequences, and after the montage ends, the staff credits roll will begin.
- Music tracks doesn't loop seamlessly due to the nature of them being a recording.
- Sounds with a 22050 Hz sample rate were played incorrectly at 11025 Hz. This initially affected all sound effects as in previous Doom Classic versions. As of the March 31, 2020 update, it is fixed.
Significant changes and additions were made in the update released on January 9, 2020:
- Renderer framerate increased to 60 Hz, with an interpolation system written by Alex Mayfield (AlexMax).
- An add-on system was integrated. The initial batch of supported add-ons were SIGIL, No Rest for the Living, TNT: Evilution, and The Plutonia Experiment. The Android and PC versions support addition of custom add-ons by the end user.
- Medikits, stimpacks, and berserk packs were changed to use a green cross instead of a pill.
- Support for aspect ratio correction was added.
- Support for quick save and load were added.
- A level select menu was added, allowing the game to be started on any level at any skill.
- A weapon carousel was added, allowing instant selection of weapons without cycling through every intermediate weapon and waiting on the resulting raise and lower animations.
- Quick weapon swap via the directional pad was added, with the following control assignments:
- Overall brightness and level brightness controls were added.
- Random sound effect pitch can now be toggled on or off.
- The split screen HUD for multiplayer was minimized, removing the status bar to allow more game display space.
Ultimate Doom specific
- All animation from the intermission screens has been restored; they were originally missing from the BFG Edition.
- The NIN logo on E4M1: Hell Beneath has been removed, presumably to avoid trademark infringement.
Doom II specific
- BFG Edition's MAP31: IDKFA and MAP32: Keen has been reverted back to MAP31: Wolfenstein and MAP32: Grosse alongside their respective map music, D_EVIL and D_ULTIMA.
- The ZWOLF* texture with Nazi iconography (Hitler portraits, swastikas, Reichsadlers, etc.) have been censored. These were initially identical to the versions that appeared in BFG Edition, but have been edited in the January 9, 2020 patch to be closer to the original textures. The BFG Edition versions of textures which had Nazi detailing were the same as undetailed versions of those wall textures. As of the patch, they have instead been restored to the original versions and then edited, replacing swastikas with the triangle logo used in the German version of Wolfenstein: The New Order, while Hitler has lost his toothbrush mustache, making him resemble the Staatmeister from the Super Nintendo version of Wolfenstein 3D., or Adolf Heiler in The New Collosus The definitions in TEXTURE1 are identical; it is the patches that have been changed.
- The Wolfenstein SS (which were effectively removed in BFG Edition) have been restored. As of the January 9 patch, the second half of their sight sound has been redubbed - they now say "schutzkämpfer" instead of "schutzstaffel", the first half still using John Romero's voice while the other half was re-recorded by Mike Rubits of id Software. Their death sounds are as normal.
- MAP06: The Crusher has been edited to remove the linedef actions on the door track of the red key door which would crash the game.
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