How to Enable or Disable Mutations on Your The Isle Evrima Server
Configure the mutations system on your The Isle Evrima dedicated server. Toggle them on or off via Game.ini.
The mutations system in The Isle Evrima lets dinosaurs develop random genetic traits as they grow — affecting stats like health, stamina, weight, and appearance. The system is enabled by default, but you can toggle it off for vanilla servers or reset it for events.
What Mutations Do
Mutations are random genetic variations that activate at specific growth stages:
| Trait Type | Examples |
|---|---|
| Stat boosts | +5% health, +10% stamina, +15% bite force |
| Stat penalties | −5% turn speed, −10% nutrition efficiency |
| Appearance | Color shifts, body markings, scarring |
| Diet | Modified diet preferences |
Each playable species has its own mutation pool. Players can see their dinosaur's mutations in the character info screen.
Enable or Disable Mutations
Stop the server
In the XGamingServer Panel, go to Console and stop your server.
Set bEnableMutations
Under [/Script/TheIsle.TIGameSession]:
[/Script/TheIsle.TIGameSession]
bEnableMutations=trueTo disable mutations entirely, set it to false:
bEnableMutations=falseSave and start
Click Save Content and start the server from Console. Mutations take effect for any new growth on next server start.
When to Disable Mutations
Most servers leave mutations enabled — they add gameplay variety and are a core part of the Evrima experience. Reasons to disable:
| Scenario | Why |
|---|---|
| Competitive PvP servers | Removes randomness so all dinosaurs of the same species are identical |
| Tournament events | Levels the playing field for organized matches |
| Hardcore vanilla servers | Some communities prefer the pre-mutation gameplay |
| Testing / development | Easier to test mechanics without random stat variation |
Existing Mutations Are Not Removed
Disabling mutations does not remove existing mutations from already-grown dinosaurs. They keep whatever traits they already have. Mutations only stop being rolled at growth milestones going forward.
To remove all mutations, you'd need to wipe player progress (see Wipe & Reinstall).
Related Settings
The diet system (bEnableDiets) is similar — it adds nutritional variety to dinosaurs. They're independent toggles:
bEnableMutations=true
bEnableDiets=trueYou can run with mutations on but diets off, or any combination.
Related Guides
How is this guide?
How to Kick and Ban Players on Your The Isle Evrima Server
Remove and ban disruptive players from your The Isle Evrima dedicated server using RCON commands and the panel Console.
Manage Playable Dinosaurs on Your The Isle Evrima Server
Control which dinosaur species are available to players on your The Isle Evrima server using AllowedClasses in Game.ini.