> For the complete documentation index, see [llms.txt](https://stellum.gitbook.io/product-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://stellum.gitbook.io/product-docs/fundamentals/achievements.md).

# Achievements

## **What Are Achievements?**

Stellum features an Achievements System to incentives its players. When you or your friends purchase Energy you gain XP. Once the XP scale is 100% full you get an Achievement (Medal) bundled with a certain Energy amount.

<figure><img src="https://744912646-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FKdEQlnC0f1cxpjA20Sz0%2Fuploads%2FnazTjeyM5wetKIZR02JF%2FStellum.png?alt=media&amp;token=3b9a2596-75a7-4fbd-a231-15f7024713fa" alt=""><figcaption></figcaption></figure>

## **How to Gain ХР?**

You earn ХР needed to get Achievements for purchasing Energy or inviting new players with your referral link.

XP is credited as follows:

* Each **Energy** unit (1) purchased with ETH earns you **1 XP**.
* Each **Energy** unit (1) purchased by your Level 1 Referral earns you **0.5 ХP**.
* Each **Energy** unit (1) purchased by your Level 2 Referral earns you **0.25 ХP**.

Your NFT Character is a powerful tool to secure more Stellum Achievements. Depending on the Character level, you can earn up to 1.3x XP in the Achievements System.

Once earned, you’re also offered to claim the Energy amount the Achievement rewards.

You can accumulate unclaimed Achievements to claim them at once later.