Whatwhatwhat?! This looks dangerously like a new project...
Sprues from Fireforge and Conquest Games (bought from 2nd City Games at a very reasonable price per sprue):
Turns out they fit together quite nicely, at least with blutac:
The list of board pieces from 3rd edition Space Hulk:
And finally some fiddling around with Inked Adventure dungeon tiles in photoshop to match said list:
Goodness, it's almost as though someone really enjoyed the mechanics of Space Hulk with their kids but then decided to spend an evening completely reskinning it for medieval fantasy, giving it the name Catacombs, inventing some nifty rules for lighting underground that don't require any book-keeping, and is now finishing off the last bits needed to make that game a reality.
Who would do a thing like that, eh?