Digging by default

[Derakon]

Originally Posted by droof

re vaults only accessibly by digging and never connected by corridors?

It depends on the vault, but I would say most lesser vaults are open to the rest of the dungeon, and most greater vaults require digging to access. This is probably a good thing, in that it requires conscious action on the player's part to crack the vault open and unleash the monsters inside it.