# How to Change the World Mode on Your Core Keeper Server (/docs/core-keeper/game-mode)



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

Setting the World Mode [#setting-the-world-mode]

Via startup parameter:

```
-worldmode 0
```

Or in `ServerConfig.json`:

```json
"worldMode": 0
```

Modes [#modes]

| Value | Mode     | Description                                   |
| :---: | -------- | --------------------------------------------- |
|   0   | Normal   | Standard difficulty                           |
|   1   | Hard     | Increased difficulty, harsher death penalties |
|   2   | Creative | Unlimited resources, building-focused         |
|   4   | Casual   | Easier difficulty, more forgiving             |

> ⚠️ **You cannot convert between Creative and non-Creative worlds.** Changing requires creating a new world on a different world slot.

Related Guides [#related-guides]

* [Server Configuration](/docs/core-keeper/server-config)
* [World Seed](/docs/core-keeper/seed-guide)