As has been posted on TTLG, a guy who goes by the handle of game_player_s has apparently found a beta version of a Dreamcast port of System Shock 2 on a second hand bought developer HD. Plus files belonging to a Dreamcast port of Thief.
http://dreamcast-talk.com/forum/viewtopic.php?f=2&t=2047

So far none of these contents have been made available yet, possibly they haven't even been retrieved from the HD yet. All there is right now, is a file listing of the relevant folders: http://www.segaforums.com/psoarchive/dc/

Holy cow!

Don't see anything that resembles source files though.

I also looked for source files first, but it doesn't look like it and considering the nature of this port, I think there wouldn't have to be any. It seems this would have been a port running on Windows CE (under DirectX 6). During the 2 years time of cooperation between Sega and Microsoft there was this idea that PC apps could be easily ported this way. But the WinCE environment didn't take full account of the Dreamcast's capabilities and the few games that were ported this way (usually preloading WinCE themselves before the actual game) ran quite laggy, especially compared to games developed specifically for the DC. So that might be a reason why the port was canceled.
And it might mean that the files are not much more than a regular SS2 install plus some WinCE and DC specific files. Of course there's no way to be sure without having access to the data. Even just a different build of shock2.exe could get the right people some clues. And yeah, unstripped missions would be nice and who knows what else is out there..
Well as you may have seen, I asked game_player_s friendly but firmly to put up an untampered archive, explaining our cause as good as I could. There were also some suggestions on the dreamcast-talk board to create a DC bootable SS2 game and sell it (for "donations"). If we ever get the full archive it might take a while.

Pretty cool. I used to be a huge Dreamcast fan and while the PC version is all I need this is definitely a novelty interest to me!

Hey there.
I registered here, because I think here are still the most dithyrambic SS2 fans out there.
Lately some dreamcast fans released a set of wince binaries and tools of two games that should be ported to Dreamcast back in the days.
The funny thing about this: one of the archives has the source of 3 games in it: System Shock 2, Thief 2 and Deep Cover (an unreleased PC game).
Don't you think, that THIS community would be able to do great stuff with it?
I can't post it here (copyright reasons, don't want to be banned after my first post), but I hope I can find here some people which are interested in looking into the source and probably bring some action into the SS2 scene.
Contact me via PN or write into this thread.
Btw: It isn't clear, whether it's the COMPLETE source, but it seems so.

Yesterday a new archive was released with a lot (complete?) source files of all these three games.
It's called thief_2_service_release.7z and is in the folder "rdrive\prj\thief2".
Sorry for not seeing the other thread before.
Could you merge the threads?

Thanks for merging.
All three games are using the so called dark engine, an updated version of the former quake engine.
There are different main folders for game specific sources, like shock for the SS2 source, DeepPC for DeepCover and Dark (for DarkProject) for thief files.
The problem is, they aren't propertly commented, so it will be a pain in the ass to get them sorted correctly.
But it's an interesting deep view into parts of the development.
I didn't know, I was allowed to link the file. Thanks for doing so.

Dunno, every message board is different in offering links for probably copyright protected material.
Btw: wouldn't it be better to change the thread title to something more appropriate, like "Dreamcast Beta port and source of System Shock 2 leaked"?
Could attract more people into this thread.

Quote by MasterPhW:

All three games are using the so called dark engine, an updated version of the former quake engine.

It's an original engine although Thief indeed looked like a Doom engine type game at first.

Ahh, yeah. Got that wrong.
You are right, it's a original engine. For everyone else who wants to know more, just check the wikipedia article.

ok, so the dark engine source genie is out of the bottle? I guess I don't need a xmas present anymore

Anyone still have the source to share? I cant find it anywhere

They said the Dreamcast port was incomplete but the actual source for the dark engine was complete and had stuff from the unreleased dark engine game Deep Cover.