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

# Upgrade System

- [Evolution](https://docs.heroestd.io/gameplay/upgrade-system/evolution.md)
- [Transcend](https://docs.heroestd.io/gameplay/upgrade-system/transcend.md)