First of all, welcome to the forum!
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
Has anyone tried porting the bonus levels of the "inferior" ports of POP1 to one of the better ones, i.e. DOS or SNES?
There are some DOS mods that have levels converted from SNES.
See here.
However, I see this is you are more interested in levels from other versions.
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
If they haven't been recreated already, would these even be feasible with current level editors?
Let's see them in order:
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
The Training level from the GameBoy Color port
I see two things that don't really work in the DOS version:
1. There is a checkpoint halfway, before the sword. (You could skip this, though.)
2. The prince exits through the same level door where he entered the level. In PoP DOS, you can open the door, but you can't exit through it.
A possible solution to both 1. and 2. is to divide the level into two, as the GBC port does. Kind of like how the original level 12 is done.
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
Levels 6, 7, 12, and 15 from the Mega Drive version (Europe only)
I know at least one Mega Drive level introduces a new potion that temporarily stops time - is this outside the scope of what a mod can do?
The Mega Drive version has some other new potions as well. See here:
viewtopic.php?p=19925#p19925
These would be somewhat hard to add to PRINCE.EXE with hex-editing, especially the potion that stops time.
It would probably be easier to extend the free software clones of PoP, like
SDLPoP or
MININIM.
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
The second/final battle with Jaffar outside the tower from the Japanese PC, Turbografx CD, and Sega CD versions
(By "Japanese PC", do you mean the PC-98 and/or the FM Towns?)
It's possible to change the princess level to have Jaffar as guard type, with
CusPoP or Apoplexy.
Then you can put Jaffar into a room on level 14. You can even put an empty room above that, to make the place look outside.
However, it's not really possible to make that part in DOS where Jaffar teleports himself and the prince outside.
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
The seven levels from the Java mobile phone game Prince of Persia: Harem Adventures, which isn't a "version" of POP1 but is still part of the pre-Sands of Time series and definitely has less-than-ideal controls
Well, that version is quite different from the PoP1 ports.
For example the levels are not divided into rooms, so the screen scrolls instead of switching rooms.
So you'd have to split the levels into rooms, but then I'm not sure how would this affect playability.
And then there are the checkpoints (which look like Aladdin's lamp). They don't exist in the DOS version, either.
Level 3 is slightly different in the TurboGrafx version:
viewtopic.php?p=19697#p19697
This is also in the PC-98 and FM Towns versions:
viewtopic.php?p=20648#p20648
Those versions also have an extended demo level:
viewtopic.php?p=19654#p19654
BlueBarracudas wrote: ↑May 21st, 2018, 10:57 pm
(I know there's also the Prince of Persia Special Edition Flash game with a new level and boss fight, but that one already has been turned into a mod)
Yes, here it is:
https://www.popot.org/custom_levels.php?mod=0000061