> For the complete documentation index, see [llms.txt](https://playdoge.gitbook.io/playdoge-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://playdoge.gitbook.io/playdoge-whitepaper/2.-history-and-concept.md).

# 2. History and Concept

- [2. History and Concept](https://playdoge.gitbook.io/playdoge-whitepaper/2.-history-and-concept/2.-history-and-concept.md)
- [2.2 The Problem with Tamagotchi](https://playdoge.gitbook.io/playdoge-whitepaper/2.-history-and-concept/2.2-the-problem-with-tamagotchi.md)
- [2.3 The PlayDoge Evolution](https://playdoge.gitbook.io/playdoge-whitepaper/2.-history-and-concept/2.3-the-playdoge-evolution.md)