An urban campaign is typically different from the usual wilderness or dungeon campaign. This section gives an overview of the urban campaign and how it is different from the typical wilderness or dungeon campaign.
When you run an urban campaign, you have to be aware that it has some fundamental differences from the usual campaign. The author of Ptolus provides some aspects in adventuring in an urban campaign already. So his advice provides the penultimate aspect of running an urban campaign. Mine deals with urban campaigns run with psionics.