DOOM II Expansions Don't work

[Emendo12]

I can't seem to get Doom II expansions to load up like with the DOOM 1 expansions. The '.c' file maker seems to actually be adding the data, as the file sizes go up, but they dont show up in the game.

[Kippykip]

Oh interesting.
Are you editing the \GBADoom\source\doom_iwad.c in text editor as well to point it to the right file?

[Emendo12]

Yeah. I tried doom 2 master levels. I named the wad 'master' and used the name also in the doom_iwad.c. same with the other expansion. I get a .gba file that is in fact bigger than the normal doom 2 game but it does not let me select an expansion.

Also, when trying to play doom 2 with an expansion added, an error screen shows up and the game is crashed. So something is happening but it isn't the good outcome.

[Kippykip]

Ah master levels. From what I remember it's not an IWAD and are usually PWADS with specific maps only that are combined with the Doom 2 IWAD. (Say loading doom2.wad + map.wad +warp 08) etc.
Loading a new level meant restarting the game everytime too. It's not like tnt.wad or plutonia.wad where everything was packed into a single loadable iwad file.

It's most likely this project can't determine what gamemode it is due to missing files + missing resources.
I admit I haven't played the recent steam re-release from bethesda so it may be different now with an episode select screen(?) maybe(?). But this project is based on the PrBoom + the original code where there was only ever an episode select screen in Doom 1.

I think the only version of master levels that was put in a single .WAD file officially was PSXDoom but that will be incompatible due to major engine differences.

I'd say the best way to do it is to use SLADE as a wad editor, modify doom2.wad itself and turn the master levels into one big file but that could be a project in itself.
But it looks like that's been done before: https://doomwiki.org/wiki/MASTERLEVELS.WAD

If you open slade, remove the levels from Doom2.wad and replace them with the ones in that, it should be compatible?
Then use doom2.c

https://doomwiki.org/wiki/Master_Levels_for_Doom_II

[fusermarucs]

Hi both - I've got TNT and Plutonia running on my gba......
Can't remember exactly how I did it - it's months and months ago - but it certainly works!

[Emendo12]

Hey, so after experimenting with PRBoom and PRBoom+ on PC, I've concluded that the failure to load DOOM 2 expansions rests within PRBoom itself. They will not load in PRBoom while No Rest For The Living loads in PRBoom+. However, Master Levels do not work with either. There seems to not be an episode select screen for the Steam or DOOM 3 BFG release of DOOM II outside of when running in GZDoom. So that means that No Rest overrides the main campaign and you cannot select between them in PRBoom+. I wonder what GZDoom does to add that episode select screen in DOOM 2...