# How to Enable or Disable Mutations on Your The Isle Evrima Server (/docs/the-isle-evrima/mutations-setup)



import { Step, Steps } from 'fumadocs-ui/components/steps';

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 [#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 [#enable-or-disable-mutations]

<Steps>
  <Step>
    Stop the server [#stop-the-server]

    In the [XGamingServer Panel](https://panel.xgamingserver.com), go to **Console** and stop your server.
  </Step>

  <Step>
    Open Game.ini [#open-gameini]

    Click **Files** in the sidebar and navigate to:

    ```
    TheIsle/Saved/Config/LinuxServer/Game.ini
    ```
  </Step>

  <Step>
    Set bEnableMutations [#set-benablemutations]

    Under `[/Script/TheIsle.TIGameSession]`:

    ```ini
    [/Script/TheIsle.TIGameSession]
    bEnableMutations=true
    ```

    To disable mutations entirely, set it to `false`:

    ```ini
    bEnableMutations=false
    ```
  </Step>

  <Step>
    Save and start [#save-and-start]

    Click **Save Content** and start the server from **Console**. Mutations take effect for any new growth on next server start.
  </Step>
</Steps>

When to Disable Mutations [#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 [#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](/docs/the-isle-evrima/wipe-reinstall)).

Related Settings [#related-settings]

The diet system (`bEnableDiets`) is similar — it adds nutritional variety to dinosaurs. They're independent toggles:

```ini
bEnableMutations=true
bEnableDiets=true
```

You can run with mutations on but diets off, or any combination.

Related Guides [#related-guides]

* [Server Configuration](/docs/the-isle-evrima/server-config)
* [Playable Dinosaurs](/docs/the-isle-evrima/playable-dinosaurs)
* [Growth Speed](/docs/the-isle-evrima/growth-speed)