> For the complete documentation index, see [llms.txt](https://help.vikingdota.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.vikingdota.com/play-duo.md).

# Play Duo

- [How to duo play?](https://help.vikingdota.com/play-duo/how-to-duo-play.md): To order a Dota 2 online duo-play service on VikingDota website, follow these instructions