Welcome to the Ravenmarch!
The ruleset is Lamentations of the Flame Princess, available here.
The available classes are:
Other classes exist in the setting and can be used as player characters when they are discovered.
Ascendant campaigns can view previous versions of their pages, see what has changed (and who did it), and even restore old versions. It's like having a rewind button for your campaign.
We've already been saving your edits, so if you
you will have instant access to your previous versions. Plus, you get a 15-day free trial, so there's nothing to lose.