Open World Doom mod adding all Ultimate Doom levels as 1 single level.
The mod allows Doom 1 to be played as one level with no loading screens while connecting all the levels, the 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 Zandroum 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 download the
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: