It seems the GOG version is not compatible. Any way to make it so?

The GOG version is compatible, but it is a bit tricky to extract the data files. At least I could mount/open the Image of the CD (RTZ.gog) with anything besides DOSBox. So here is what I did to make it run in ScummVM:

1) Open the dosboxRTZ.conf file in the Return to Zork install directory with a text editor. Scroll all the way down to the [autoexec] section. Deactivate all lines after "imgmount d "rtz.inst" -t iso" by writing a # at the start of the line.

2) Right click on the Return to Zork shortcut and select properties. in the target field delete everything after "-conf dosboxRTZ.conf". If you you want to keep the GOG version maybe copy the shortcut to somewhere and edit the copy.

3) Execute the shortcut. You should have a nice DOS prompt now. You need to type in and execute the following commands now (the lines starting with # are my comments what the command does and should not be typed):
mkdir c:\temp
# creates out dump directory in the RtZ folder
d:
# switch to the mounted CD image
copy RTZCD.* c:\temp
# DOSBox froze up for me for a few minutes at this command, it seems it is not build for copying
copy *.pmv c:\temp
# those 2 commands copy all the files we need from the CD Image to the dump directory

You can close the DOSBox window by typing exit or by clicking on the close button (if it is not fullscreen)

4) Copy all the files from PATH\TO\RTZ\TEMP to a new folder, whereever you want to put your ScummVM game datafiles.

5) Copy the ripped Music files from the GOG directory (folder Music) to that new directory. You need to rename them so ScummVM recognizes the tracks. ScummVM wants the files to be named track#.ogg. And they start at 1, but GOG numbered them after the track number on the CD. So you need to decrease the number by 1.
So i.e. the first track rtz_02.ogg should be renamed track1.ogg (no leading zeros).
Rename the other tracks in that fashion, like
rtz_03.ogg -> track2.ogg
rtz_04.ogg -> track3.ogg
and so on.

Now you can add your new folder to ScummVM via the main menu screen and all should work. I could not test the music yet I think my renaming should be right, according to the ScummVM docu.

If you can find a way to mount the CD image files (RTZ.inst seems to be a kind of description file for the image for DOSBox) you could save you the whole DOS prompt trouble, but that worked for my quick try.
Please post back if it worked for you or not.

Yeah that it true, I don't really know what CD image format GOG is using here. Seems a bit like bin/cue but it isn't apparently.
Maybe you should try mounting the .gog file with something like Daemon Tools. At least ImgBurn does recognize the file as an "UltraISO" file. Unfortunately I don't have Daemon Tools installed at the moment and can't easily install it because some game "copy protection" does not like it. Damn you DRM!!

wow, cool! Thanks! Now I just want to find a way to play it on a physical PC!

You mean playing it on an actual (very likely old) PC (DOS system) without using ScummVM or DOSBox? Well that would probably involve burning that CD image GOG uses onto a actual CD. Judging only by the age of the game it does probably not have any real copy protection, so burning it to a CD with audio tracks should work. Maybe you would have to copy the rest of the GOG installation too, I'm not sure if the image has the original setup program.

Thank you Gabelvampir your step by step guide worked like a charm

Since nobody else did, I would like to post relative success using essentially the procedure outlined by Gabelvampir. The format of the CD image is 2352-byte blocks, so it probably includes copy protection information (QR) in addition to the ISO, making it difficult to mount directly. Not that it matters, since dosbox can mount it pretty easily itself. The game starts and seems to be working fine using Linux scummvm (it just crashes without the extra files copied from the virtual CD).

Thanks for the help I followed the easy instructions and got Return to Zork working correctly in Scummvm

I know I'm reviving a dead thread here, but I thought I'd mention this here to save someone the hassle of transferring through DOSBox.

The file format GOG uses for this release is .isz, even though it is titled .gog. Change the extension and it will mount in programs such as Daemon Tools like any other image.

It worked for me!

Couple of notes:

You can do it with regular DOSBox without editing the conf file. You don't need to imgmount rtz.inst (which is a CUE file pointing to rtz.gog and all the music tracks). You can just mount rtz.gog directly as an ISO file:

imgmount d rtz.gog -t iso
d:

Then copy all the files from D drive in DOSBox to a real folder. This suggests that rtz.gog is a normal ISO file, even though Windows doesn't recognise it as such (since as far as I can tell, DOSBox can only read ISO files, not any other fancy disc image format). Are you sure? I tried to open it using isz-tool and it says it wasn't a valid ISZ file. I'm pretty sure if it was ISZ, DOSBox wouldn't be able to open it directly with imgmount.

sorry to necro, but im trying to do this now. there is a new file "DosboxRTZ_single.conf" which now has the [autoexec] in

i modified those lines under imgmount with a # at the start.

the shorcut i deleted everything after "-conf dosboxRTZ_single.conf". the game just launches with dosbox.

i manually mounted "rtz.ins" from the folder, as i have descoverd the file the dosbox launches has a ".ins" not a ".inst" at the end.

however now i get "unable to make C:\temp"

what do i do?

Add a "#' in front of "mount C "..\cloud_saves" -t overlay".
That should allow you to create a TEMP directory using mkdir.

structure for CD audio


/RZORK/track1.ogg
/RZORK/track2.ogg
/RZORK/track3.ogg
/RZORK/track4.ogg
/RZORK/track5.ogg
etc
/RZORK/track25.ogg


there will be no /RZORK/Music or /RTZ/music etc.
all the ogg or wav go in the base directory with the other game files


tested with scummvm 2.5.1 on linux.

Required files can be extracted from RTZ.GOG by using 7zip or any similar unpacker. RTZ.GOG contains standard iso-file, which can be unpacked with 7zip as well. Dosbox is not required.