The mod allows Doom 1 to be played as one level with no loading screens while connecting all the levels, the other mod also allows Doom 2 to be played as one level with no loading screens. The main game keeps all the secret's, the weapon locations, etc...

The game itself is an on-going project that I'm doing by myself, this is being done for fun, so I can make the original Doom games seem like open world games.

This works best with Zandronum or ZDoom and not recommended with Zdaemon due to their strict rules that forces it to only work offline. It currently is working via Zandronum online, If I do post any multiplayer servers for any new/old builds then I will mention it on this page linked. (Usually hosted on Doom-seeker server under the name "Ultimate Doom Open World", is usually hosted by 'bestever' servers)

It's also been tested to work with the Doomsday engine.
>Due to legal reason's anyone downloading MUST have a copy of the
original Doom game's so please respect 'Id software' and buy a copy from
Steam or buy it even from their official website before downloading the
mod. (Requires the original Doom files to work)

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Update: 04/03/2016: Currently aware of Doom 1, 2's issues, will be looking into these eventually, sorry if I haven't updated as much but I'll get around to it eventually, just don't want to rush any new builds until I'm sure I can bring out more stable builds. I am also considering making changes based on feedback that I was given.

Mods currently been used by: The Aliens Mod, is compatible with Brutal Doom. (Older PC's may experience lag)

Update: 15/9/2014

The Ultimate Doom 1 Beta 3 build has been tested, is now working on the Doomsday Engine.

Blog from Feb:

Currently I'm proud to say that the Ultimate Doom is now working as 1 single level. So you should in theory be able to explore the entire Ultimate Doom, be able to go anywhere, that includes all the secret levels (except the Xbox version's because I don't have those files)

Feel free to check the full preview here:

Doom 1 build here:

Doom 1 under 1 level.Version 3

(Doom 2 build can be found in downloads section but I'm trying to work on a new build, just currently have problems with loading more than 22 levels with the non-existent demon kill bug)
Doom 1 under 1 level preview.

Doom 1 under 1 level preview.

News 1 comment

Preview of Doom 1 all under 1 level preview. Basically this is show-casing the new build, the current state of the project at the moment. (Kind of like...

Doom 1, 2 fusion progress

Doom 1, 2 fusion progress

News 2 comments

At the moment testing what works, uploading my latest build to help trouble-shooting. Anyway the current build runs from Doom 1 on episodes 2,3,4 and...

Doom 1/2 compile files ready.

Doom 1/2 compile files ready.

News 7 comments

To be clear the Doom 1 download is a level fusion with all Doom 1 episodes in one single level with no loading screens. The Doom 2 download is basically...

Fistful of update

Fistful of update

News 2 comments

Updated from just 1 episode fused together, now 2 episodes fused and will hopefully will be releasing the ENTIRE Doom 1 under 1 level but currently deep...

Doom 1 under 1 level.Version 3

Doom 1 under 1 level.Version 3

Full Version 11 comments

Open World Doom mod adding all Ultimate Doom levels as 1 single level.

Doom 1 as 1 level. Version 2.0

Doom 1 as 1 level. Version 2.0

Demo 0 comments

This is another build to try and get rid of bugs.

1st Attempt at fusing Doom1,2 together

1st Attempt at fusing Doom1,2 together

Demo 0 comments

Basically this is Doom 1's episode 2/3/4 fused while adding the first 2 levels of Doom 2 to make one continuous level.

BETA: Doom 2 compiled as one continuous level.

BETA: Doom 2 compiled as one continuous level.

Full Version 4 comments

Doom 2. All Doom 2 episodes under one continuous level with no loading screens. Just a warning, this version is unstable, will try to make a new build...

Doom 2 episode 1 compiled.

Doom 2 episode 1 compiled.

Demo 2 comments

Basically the first 6 levels fused together as 1 level.

Full Doom 1 on 1 level with plenty of bugs

Full Doom 1 on 1 level with plenty of bugs

Full Version 5 comments

Basically this is for test purposes, if I somehow find a more stable build then I'll remove this then replace the download. This is not stable on the...

Comments  (0 - 10 of 23)
DarkKnightGareth
DarkKnightGareth

What program/s did you use and how did you combine these maps into one giant map?

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Ronnie42 Creator
Ronnie42

The only software needed for making this mod was Doom-builder, no extra programming was needed, it's more about mapping out the levels correctly, compiling the builds. Anyone with a lot of time could actually do what I do. I just experiment with the mod to see what I could do with the project.
Hope this helps:
Doombuilder.com

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punk0x29a
punk0x29a

Hi there!
Just made some partial speedrun - very good job, altough some parts are clearly broken ( clipping in Military Base make it impossible to finish 100%, for example )
Can't wait for the full version, got very suprised here :)

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Ronnie42 Creator
Ronnie42

Wasn't aware of this, I may need to look into this at some point. Glad to see you like it so far. I had a release before but ended up bringing it back to TBD release since too much work to do for now to fix all the bugs in Doom 1, sadly Doom 2 was more unstable.

Reply Good karma+1 vote
Guest
Guest

Im almost done replacing all tags for E1 with unique ones " thanks for the level man :)

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Ronnie42 Creator
Ronnie42

Glad to hear you're enjoying the mod.

Reply Good karma+1 vote
Randomguy7
Randomguy7

The doom 1 open world version works. the doom 2 one starts at the end of the game and you can walk through the walls. the doom 1 and 2 version starts at some random map and there are broken textures. Still, excellent work!

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Ronnie42 Creator
Ronnie42

I'm still looking into the Doom 2 issue, seeing about rebuilding and fixing the wall issue but there's a lot more issues with the build.

I'm not sure which Doom 1 build you're referring to since the Doom 1 build version 3 always spawns near the start of Doom 1 for me.

Reply Good karma+1 vote
Sofiachan
Sofiachan

this looks so awesome

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Ronnie42 Creator
Ronnie42

Thanks, also thanks for the rating too. :)

Reply Good karma+1 vote
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Doom 1 as 1 level, Doom 2 as 1 level
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Ronnie42
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