Apologies if it's been done before.
Are there any rule systems in place for a Warhammer Quest style tunnel system for Mordheim in place at the moment?
I'm keen to develop some close quarters gameplay for Mordheim.
Town Cryer #7. “Sewer Rats” article. Tunnel scenarios and rules for dungeon-crawl-style sessions (and campaigns). Even specifically mentions using sewer tunnels in small sections such as with Warhammer Quest.