Blood on the Dungeon is a free expansion for Blood on the Blade (BoTB). This rule set includes everything you need to introduce a classic Dungeon Crawl play mode for BoTB.
This set of rules makes it possible to play a BoTB Scenario using “classic” dungeon tiles (rooms and corridors). Every major fantasy game includes standard dungeon tiles and it’s also very easy to find cheap (or even free) map tiles on the web. Playing BoTB using dungeon tiles provides a different mode of play and can be a fun interlude within your Campaign... of course, nothing prevents you from playing a Dungeon-only Campaign either!
You need the Blood on the Blade rules to use this expansion.