Level weighing

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.

High-level favorization

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, Scorched Earth, Aberration and Extinction, and 0.5 for The Center, Ragnarok, Valguero, Crystal Isles, Genesis: Part 1 and Genesis: Part 2. Rolled levels (a) are linearly interpolated (f(a, b, alpha) = a*(1-alpha) + b*alpha) to the upper bound of the Level Weight range (b), using the world setting value (alpha) and than floored.

Example:

A rolled level of 7 will be interpolated to 7 in a map with lerp value of 0

f(7, 12, 0) = 7

While in a map with lerp value of 0.5 will be interpolated to 9.5

f(7, 12, 0.5) = 9.5

Finally, it will be floored to 9.

Values

Game data 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:

•  Alpha Deathworm
•  Alpha Leedsichthys
•  Deathworm
•  Giant Bee
•  Glowbug
•  Jerboa
•  Jug Bug
•  Leedsichthys
•  Liopleurodon
•  Titanosaur

The following creatures have different level weights:

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

Plots

The following plots represent the level distribution on official maps for common creatures (i.e.: excluding tek creatures, creatures with 38 level steps like Wyverns, creatures spawning only at level 1 like and those spawning at higher difficulty level like in some caves).

For maps having a lerp value of 0:

• 

  To note the low population of high level creatures

For map having a lerp value of 0.5:

• 

  To note how some level have 0 samples.