When you say "crash", you mean it locks up in MESS, but doesn't otherwise cause MESS to die, correct? Just so I know what to look for.
Lemmings and one other (I can't remember which, it only happened once and wasn't reproducable) actually crash the emulator, right back to the command line.
The others are just ingame lockups and usually occur when transitioning between scenes, or if something needs loading, even if that transition has worked previously.
For referece Sargon Chess crashes the actual emulator quite often (exit to commandline), as does 3rd Degree.
