Fortitude

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Hypothermia.png
Fortitude.png

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 4.5. In the HUD you will see rounded down integers. 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.

Points Spent 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
Fortitude 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
Hypothermal and
Hyperthermal Insulation
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
Points Spent 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
Fortitude 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98 100
Hypothermal and
Hyperthermal Insulation
117 121 126 130 135 139 144 148 153 157 162 166 171 175 180 184 189 193 198 202 207 211 216 220 225

Utility

Each point spent on fortitude will increase your knock-out threshold by 1. This also reduces torpidity gain rate and increases torpidity drop rate.

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 51 torpidity to fall unconscious and so on.

Torpidity also seems to reduce the chance of catching diseases like Mega Rabies and Swamp Fever. This is yet to be tested.

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.
    • Staying inside a stone or metal building on Scorched Earth almost always results in overheating. Insulation is unlikely to resolve this problem.
  • 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.

Changelog

Patch  ARK: Survival Evolved Changes
172.3 10% global insulation effectiveness boost.
174.0 Increased effectiveness of temperature insulation by 20%.
188.1 Fortitude stat now has 1.5x the insulating effect as previously.