Multiple Routers in one app

[niwla23]

This is a quite special usecase. I am building a browser game where you have one public router which routes can be accessed directly (for example imprint, privacy, invite link). But when the game starts there are multiple stages which should not be accessed publicly so I would like to use a memoryRouter only for these ingame routes.
I tried doing this, but I got an error telling me that I can only have one router in the app.

So can I somehow have browser routing on the parent and inside a specific route memory routing? Or should i maybe just build my own memory router with if / else statements for the ingame routing?