Frostfall is a lore-friendly immersion mod created by Chesko for The Elder Scrolls V: Skyrim.
The aim of Frostfall is to make Skyrim more realistic by allowing the Dragonborn to die of hypothermia in the arctic regions of the province. The Dragonborn must wear warm clothing (such as fur armor), build campfires, seek shelter and keep dry to survive. There are three preset difficulties, the hardest of which prevents fast travel. All aspects of this mod can be tweaked individually with the Survival Settings power (users of SkyUI 4.1 or above can make changes through the Mod Configuration Menu).
How cold the Dragonborn is is measured by a mechanic called Exposure. If the Dragonborn's Exposure reaches -100, they will die. If they are warm and their exposure is +20, they will benefit from stat boosts. The cold can be kept at bay by wearing warm clothes, eating certain foods, keeping dry (being wet increases the rate at which heat is lost), or being near a fire. Being near a fire, forge, or smelter will warm a character up. If it is raining or snowing, the Dragonborn has to be under a shelter for this to happen.
Frostfall also has a mechanic called W.E.A.R, which causes the Dragonborn's resistance to exposure to be directly affected by the type of clothing he or she wears. For example, equipping full fur armor (including head gear) will give him or her 100% exposure resistance, as long as it is the fur armor texture that has sleeves and a shirt (not the skirt version). Additionally, cloaks from the Cloaks of Skyrim mod work in tandem with Frostfall, keeping the Dragonborn warm and/or dry, depending on the cloak's material, as well as increasing resistance to exposure.
Frostfall has many crafting and gathering features. One of them is gathering deadwood, which allows the Dragonborn to build a fire (an essential for survival). If they have a woodcutter's axe, they can harvest firewood (it requires less firewood to start a fire than deadwood), which adds wear to the axe. (Firewood collected by using a wood chopping block with the same axe does not cause wear). Firewood can be used to build a tanning rack, which the Dragonborn can use to craft fur armor, tents, and other things to help them survive Skyrim's often harsh climate.
The mod provides a variety of spells to make the life of the survivor easier. The following new spells with purchasable spell tomes have been included: