Hostile Climes

From Depths of Despair Introduction:

The Hostile Climes series takes your fantasy adventure game out of the dungeon and tosses it into whole new climates throughout your campaign world. Each such book features new rules to help you handle situations that are likely to crop up in such places. These are located in the rear of the book for easy access later in your gaming.

The bulk of each book, however, is a fully developed location set in the appropriate climate themed for that book. This gives you a chance to use those new rules to their fullest, and it opens the door to all sorts of new kinds of adventures.

The locations described in each Hostile Climes book are designed to be isolated places, the kinds of areas that your heroes might have ignored or merely overlooked, even in a region they know as well as the heft of their own swords. This allows you as the DM to plop them into your campaign world at any reasonable point you like and have it be as if they were always there.

This series should eventually span the various climates of a globe from top to bottom, covering everything in between. This includes everything from the icy landscapes of the polar caps to the blazing heat of tropical deserts.