How to link the fallen london account to sunless sea? I get some sort of treasure i could use in sunless sea, but i don’t know how to get it there.
In Sunless Sea, try checking the option tab on the main menu (as in the one before you load games and some such) - there should be an account management button within the option tab.
There’s a Download New Stories button too, but I forgot if that one requires logging in. Either way, one of them will let you log in with your FL account.
The bonus only applies for any new games you started after logging in, by the way.
I think the New Stories button leads to the login section, actually. Though I could be wrong as it’s been a while since I’ve needed to do so. :-)