I'm back! Like the tortoise I return, slow yet formidable.
And why wouldn't you want a tortoise-city in your games? Once the PCs have finished their discworld jokes, they could cause all kinds of trouble in the tapering spires on top, or the (literal) seedy underbelly below.
Of course, things are never so straightforward - there's the literal problem of an impending doom to deal with first. Read on for more!