Fortitude

Overview

Fortitude is a measure of your resistance to the Weather, Torpidity, and Disease. A higher Fortitude increases your natural Hypothermic and Hyperthermic insulation, reduces rate of defecating near  Tyrannosaurus roar, and lessens the effects that you receive from  Hypothermia and  Hyperthermia. It also gives you resistance to  Torpidity-increasing effects such as consumption of  Narcotic, hits from  Tranquilizer Arrow or  Slingshot, Scorpion stings and other Torpidity-inducing attacks from creatures.

Increasing

Each level point spent increases fortitude by 2. This in turn increases the hypothermal and hyperthermal insulation by 4, and at certain level it is increased by 5 (see table below). Bear in mind to resist hypothermic effects at -5 °C(23 °F), hypothermal insulation of at least 200 is required - so you will not be able to resist all weather effects using fortitude alone without adding an obscene amount of points to the skill.

Fortitude	0	2	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60	62	64	66	68	70	72	74	76	78	80	82	84	86
Points Spent	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42	43
Hypothermal Insulation	0	4	9	13	18	22	27	31	36	40	45	49	54	58	63	67	72	76	81	85	90	94	99	103	108	112	117	121	126	130	135	139	144	137	148	153	157	162	166	171	175	180	184	189
Hyperthermal Insulation	0	4	9	13	18	22	27	31	36	40	45	49	54	58	63	67	72	76	81	85	90	94	99	103	108	112	117	121	126	130	135	139	144	137	148	153	157	162	166	171	175	180	184	189

Each point spent on fortitude will increase your knock-out threshold by 1. A Human with 0 points in fortitude will be knocked-out once his torpidity reaches 50 points, a human with 1 point in fortitude requires a torpidity level of 51 to fall unconscious and so on.

Notes

• Various Armors will also increase (or decrease) your Hypothermic and Hyperthermic insulation.
• Food dishes can be used to temporarily increase your resistance to extreme temperatures:  Fria Curry gives Hypothermic insulation, and  Calien Soup gives Hyperthermic insulation.
• Inside a building insulation is increased by 112 Hypothermic and 56 Hyperthermic. As of Scorched Earth stone and metal make higher temperatures more dangerous.
• While Fortitude reduces the  Torpidity gained from various damage sources, it does not decrease the damage you receive.
• As of Patch 280.114 natural insulation from fortitude was increased by 8% and the knock-out threshold now increases with fortitude as well.