Let me start by saying that I am in the process of converting a fan made game known as Space Quest: The Lost Chapter, over to the ST from the PC. It is basically 90-95% complete. I'm testing it now with a walthru, clearing about memory bugs. It will, however, only be HD installable as far as I can tell. Here is a site for more info on the game:
I actually did most of the work 2 years ago and never finished.
After that, I plan on converting another fan made Space Quest game called Space Quest 0: Replicated, which has a site here:
These would both have an identical interace as the earlier Sierra games. As far as converting the games go, it is relatively painless for the most part, except for memory issues, typically the game will run short of about 100 bytes of memory available and crash, and to rectify that, I just hack the code and free some space, in creative ways in some instances.
In my work, I have come across an alternate version of Kings Quest 4, which could also be converted (I think). I wonder if there is any point to this. It is a more primative version (I believe) than the conversion we got from Sierra for the Atari, primitive meaning the graphics are smaller, but still quite similar.
I might find some other games in the same vein to possibly convert, but they might be on the back burner, as I am mostly doing the first 2 conversions to get more understanding of how Sierra made their games to try the next challenge.
That will be trying to move over Quest for Glory 2 to the ST (I have been told that it was actually ported, just was cancelled before release). I think I have a 50/50 chance of converting it. Problem is, I need to look at both the Amiga and PC versions of the game, which will make things a little more time consuming. If that works, these other titles have the possibility of being ported over:
Hoyle Official Book of Games - Volume 3
Jones in the Fast Lane
King's Quest V: Absence Makes the Heart Go Yonder
Space Quest IV: Roger Wilco and the Time Rippers
Graphics are easy, as everything is already 320x200 with 16 colors, it is sound which I need to figure out. And these titles are a coin flip (changes in the way Sierra made the games might make it harder to hack them to work on the ST)
Castle of Dr. Brain
Conquests of the Longbow: The Adventures of Robin Hood
EcoQuest: The Search for Cetus
Leisure Suit Larry 5: Passionate Patti Does a Little Undercover Work
Mixed-up Fairy Tales
Police Quest III: The Kindred
The last item I am eyeing, which is not a Sierra item, is Indiana Jones and the Fate of Atlantis (Adventure Version). I think it might be possible to get it running on the ST, but I really need to have a good look at the performance of the game on an Amiga 500, which means dusting the old machine off.
As with all of the above games, they are basically built with each machine having a interpreter to run data files on the platform. For early Sierra games you can take the SQ1 files from the ST, and they run on the PC or Amiga. For the later games, it is a little more complicated because of the way sound is handled. Quest for Glory 2 uses the same system as Space Quest 3 and Leisure Suit Larry 3.
As for LucasArts, Indiana Jones and The Last Crusade (Adventure) uses almost the same system as Fate of Atlantis, and tools exist for rebuilding the data files, which might make this conversion possible, but I have not yet looked at how the game was packaged for the ST, which I might try to do later today. I think this conversion has a 25% chance of happening (low percentage due to my current lack of knowledge), but you never know.....
I would have used a better subject, but did not want to put hopes into something that might never work out (or be lost due to lack of time).