Level Weight

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One of the many values that are configured for the creatures of ARK: Survival Evolved and its DLCs is the Level Weight, or in terms of the DevKit the data structure named Dino Base Level Weight Entries in the blueprint {creature}_Character_BP.

These numbers specify the probability of the level a wild creature will have when it spawns into the game. Most creatures share the same values. The DevKit value Level Range needs to be multiplied by the Difficulty to get the in-game level.

There is also setting named "Dinos Lerp to Max Random Base Level" that can be configured in the World Settings of a map. This setting has a value of 0 for The Island and all Lore DLCs and 0.5 for The Center, Ragnarok, Valguero, and Crystal Isles. Rolled levels are linearly interpolated (f(a, b, alpha) = a*(1-alpha) + b*alpha) to the upper bound of the Level Weight range, using the world setting as the "alpha" value.

DevKit values In-game
Level range Weight Level at
official difficulty
Probability
1-5 1.0 5-25 54%
6-12 0.5 30-60 27%
13-20 0.25 65-100 13.5%
21-30 0.1 105-150 5.5%

The following creatures only spawn at level 1 or the lowest possible level:

The following creatures have different level weights:

Creature DevKit values In-game
Level range Weight Level at
official difficulty
Probability
Hyaenodon 5-5 1.0 25-25 54%
6-12 0.5 30-60 27%
13-20 0.25 65-100 13.5%
21-30 0.1 105-150 5.5%
Overseer 1-5 0.6 25-25 40%
6-12 0.3 30-60 20%
13-20 0.3 65-100 20%
21-38 0.3 105-190 20%

Alpha Fire Wyvern
Fire Wyvern
Lightning Wyvern
Poison Wyvern
Zombie Fire Wyvern
Zombie Lightning Wyvern
Zombie Poison Wyvern

1-5 0.6 25-25 40%
6-12 0.3 30-60 20%
13-20 0.3 65-100 20%
21-38 0.3 105-190 20%
Rock Drake 1-5 0.6 25-25 40%
6-12 0.3 30-60 20%
13-20 0.3 65-100 20%
21-38 0.3 105-190 20%