Evolution Events

This was found out by code mining.

Theoretically, there are 19 events, and they are randomly drawn. Under some circumstances, the game has to roll another event

Related Server Commands

 * See Command Line Arguments

Variables

 * "evoeventinterval" alters the duration of all events, but also the interval
 * "bplayevohotcold" (default= false) (seems to be a reverse logic, as true puts it in an unlimited loop)
 * "bplayingevofog" (default= false) (seems to be a reverse logic, as true puts it in an unlimited loop)
 * "weatherenabled" (default=true)

Event Interval

 * "EvoEventInterval"[Set to 0.35/1 if not between this range] * 600 [Regular Playtime] or 190 [Sudden Death] = Seconds after which an event is fired
 * Default Values (Wildcard Official): 1 Player: 0.3; 2 Player: 0.5; 4 Player: 0.6

Example: EvoEventInterval=0.5
0.5*600s=300s=5min 0.5*480s=240s=4min
 * Every 5 minutes an event is fired.
 * Timed events last 4 Minutes

Survivor Tracker!

 * Duration: 360 seconds (6 minutes)
 * Gets replaced by another event if >120 alive players

MegaFog

 * 1) After a random delay between 3000 and 7500 seconds (50 min and 125 min)
 * 2) Aggro Range limited by -1200 units
 * 3) Reads time index from "fastfog" command

MegaHeat / MegaCold

 * After a random delay between 1600 and 5000 seconds
 * 50/50 chance
 * Thesis: This events must this occur every game thats between ~26-80 minutes long

Acid Rain

 * After a random delay between 650 and 3600 seconds
 * If the player does not have broken legs (<30 HP), he loses 0.7hp per second. If hp are under 30, you don't lose health.
 * Equipped items lose 0.5 durability per second.
 * Seems to occur instead of regular rain

Superloot Crate

 * Event disappears after 360 seconds
 * Called Supplycrate_level60 but do not require a minimum level
 * Loot Table

Food of the Gods

 * Event disappears after 60 seconds
 * Called Supplycrate_level60 but do not require a minimum level
 * Loot Table

All Bosses

 * Broodmother, Megapithecus, Dragon
 * Event disappears after 30 seconds
 * Level is 1
 * The spawn point is set
 * Aggro Range is 1x
 * There seems to be a 50% spawn chance between Broodmother or Megapithecus

The Beast Within

 * Duration of Event: EvoEventInterval * 480 seconds
 * Forces Dino AI to target players
 * Activates a red fog Unclear

Day-Night Switch

 * Event disappears after 60 seconds
 * Allows day time to advance, (which means a switch to night) Unclear

Predator's Night

 * Duration of Event = EvoEventInterval * 480 seconds
 * Carnivore Aggro Range x2
 * Carnivore Player Aggro Range x2
 * Sets Carnivore aggro Range on Players x4Unclear, but math
 * Allows advancing to day and night time Unclear

Supply Overload

 * Event disappears after 60 seconds (Crates stay)
 * Spawns supply crates on all possible volume, no check for vacancy

Double Taming

 * Duration of Event = EvoEventInterval * 480 seconds
 * 2x taming speed

Harvest Bounty

 * Duration of Event = EvoEventInterval * 480 seconds
 * 2x harvest amount

Harvest Famine

 * Duration of Event = EvoEventInterval * 480 seconds
 * 0.1x harvest amount

I love you, you love me

 * Officially disabled Unclear
 * Duration of Event = EvoEventInterval * 480 seconds
 * 2x mate boost effects

Hail the the King

 * Event disappears after 30 seconds
 * Spawns 650 units above each player
 * Loot table

The Swarm!

 * Event disappears after 360 seconds
 * 0.6 second delay before spawn
 * Spawns 10 Meganeuras (Level 9) for each player
 * Different locations around the player (935 units above, 200 units in other directions)

ARKtic Monkeys!

 * Event disappears after 360 seconds
 * 1 second delay before spawn
 * Spawns 3 Mesopithecus (Level 5,5,7) for each player
 * Spawn 3000 units in the air and fall
 * Have Chitin helmets equipped, 0.0 quality?

Herbivore Drop!

 * Event disappears after 360 seconds
 * Gets replaced by a random event if alive players > 100
 * 2 second delay before spawn
 * Spawns 15000 units in the air and falls
 * Interestingly, option 4 cannot happen, because a random option number between 0-2 (integer, 1-3 natural numbers) is generated. This might be a bug

Carnivore Drop!

 * Event disappears after 360 seconds
 * 1 second delay before spawn
 * Spawns 8000 units in the air and falls
 * Interestingly, there are 2 more Raptor spawns and 1 more Carno spawn that are not active. This is most likely due to balancing

Source
The Island Level Blueprint