
There are basically three clones out there you can use to replay DM and CSB:
- CSBwin (by Paul Stevens): A direct port of the original Atari ST source code. If you want to replay the games exactly as they were on the ST, this is the clone for you.
- Return to Chaos (by George Gilbert): Completely new code that was written in an attempt to match the original as good as possible. It features some nice new additions like higher-resolution graphics and the monster step sounds that were missing in the ST version (and thus, in CSBWin as well), but the damage and experience formulas are a little off. Also, monster groups can split and regroup. If you haven't played the game for a long time, you will hardly notice the differences, though.
- Dungeon strikes back (by Sophia): A faithful adaptation of the original source code that is actually improved. Some stuff in the original code didn't make sense or were obviously buggy, and DSB corrects these. However, I am not quite sure if both DM and CSB are 100% playable for DSB.
There is also DM Java that recreates the game in Java. It comes with a totally different dungeon and altered graphics, though; personally, I never liked it, but others seem to think highly of it.
So, if you want to have the closest possible experience to the ST, go for CSBWin. But really, RTC and DSB are great, too. Hope you enjoy your time here!