> For the complete documentation index, see [llms.txt](https://bitbrawl.gitbook.io/bitbrawl-kingdoms-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bitbrawl.gitbook.io/bitbrawl-kingdoms-whitepaper/your-kingdom/buildings/fortress.md).

# Fortress

* **Function:** Provides players with achievement-based progression, rewarding them with bonus attack damage stats upon completion of specific milestones.
* **Progression System:** Players unlock new achievements every 10 levels, offering continuous goals and rewards.