> For the complete documentation index, see [llms.txt](https://ton-docs.theoldcastle.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ton-docs.theoldcastle.xyz/overview.md).

# Overview

The Old Castle Defense is the most fairest and transparent play-to-earn (P2E) on-chain game, where players fight battles and sieges using their Terrible Creatures and Knights of the Kingdom.

**The Old Castle Defense** is the fairest and most transparent play-to-earn (P2E) on-chain game, where **players** fight battles and sieges using their **Terrible Creatures** and **Knights of the Kingdom** NFTs and are rewarded with **$SPH** and **$TON** tokens for victories. **Investors** are the third party of participants who can change the outcome of battles by investing in any of the teams, buying attacks, and saving NFTs from death. All funds from **investors** are going to the treasury of both **factions**. 

<figure><img src="https://802054756-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FX9zLrMAvJTcfpZOUGBNh%2Fuploads%2FOrq1BGPOB7NkrVyCAvND%2Ftelegram-cloud-document-2-5411392397613475335.jpg?alt=media&amp;token=297c37e9-ccf3-4537-a442-ec5f11b99da8" alt=""><figcaption><p>Definitions map of the Old Castle Defense. </p></figcaption></figure>

The winning **faction** wins the treasury of the losing team. Winning **faction** treasury refunds back to **investors** with rewards.

The game doesn't have timing. It's the on-chain game - it has blocks, where 1 block ≈ 5 sec.

{% hint style="info" %}

* **$SPH** - Game Utility token;
* **$TON**- Treasury coin;
* **Player -** a user that owns an NFT from Terrible Creatures or Knights of the Kingdom NFT collections.&#x20;
* **Factions -** Opposing sides: the Terrible Creatures versus the Knights of the Kingdom;
* **Investor -** a user who has not staked an NFT, but has staked $**TON** on either one or both factions during the game. If the investor wins, the investor receives a reward, and all invested $**TON** is returned to the winning team;
* **The Siege -** the length of each entire game, approximately lasting 864,000 blocks (\~30 days);
* **Battle -** a game event that takes place every 4,800 blocks (\~4 hours).

You can track blocks by the block explorer
{% endhint %}

{% embed url="<https://www.youtube.com/watch?t=1s&v=n1J3004v5Mk>" fullWidth="false" %}
Check out The Old Castle Defense Game-flow directly from the Mobile wallet.
{% endembed %}

{% content-ref url="/pages/ZQNJ1WsGOuxJb9qjP7B5" %}
[How to start play on TON](/how-to-start-play-on-ton.md)
{% endcontent-ref %}

{% content-ref url="/pages/VJvxpk4IZf6odFlusjr7" %}
[Game-Fi Elements](/game-fi-elements.md)
{% endcontent-ref %}

{% content-ref url="/pages/VLO6pMLTO13NTnRquFLH" %}
[Rewards After The Battle](/rewards-after-the-battle.md)
{% endcontent-ref %}