Overview

To a Lancastrian living in Ankh-Morpork, winter is nowhere near as cold as it was back home. A Klatchian scoffs at the paltry Uberwaldean summers. This is a simple idea to implement a small amount of nationality-based climate resistance.

Essentially, players coming from warmer areas of the Disc tolerate the heat better but the cold worse. Players coming from colder climates tolerate the cold better but the heat worse. Players coming from somewhat neutral areas are unaffected.

I don't know enough about how temperature works to suggest the best way to implement this, but it seems that making people from cold climates a few degrees warmer and people from hot climates a few degrees cooler would do the trick.

Based on the MUD and books, here are how I imagine the in game areas to map out:

Region	Area	Climate
Sto Plains / Istanzia	Between Klatch and Ramtops	Neutral
Uberwald	Most areas of Uberwald	Neutral
Klatch	All of Klatch	Hot
Genua	Genua/Bois area only	Hot
Agatea	The Agatean Empire	Cold
Ramtops	Anywhere in the Ramtops	Cold

This idea should be rather easy to implement, as it simply needs a single value to be stored (-X, 0 or X) when a player selects a nationality, and that value be used when calculating how hot/cold a player is. The above regions are guidelines - a decision can be made for every possible nationality.

Told you it was a short one!