Headstone for a hero who died fighting the Final Boss.
There is one specific Town Event that targets the Graveyard, being From Beyond. When this event is triggered, you are presented with three randomly selected fallen heroes. You get to choose one of them, and the chosen hero will be returned to the living, and into your Roster. There are a few things to consider:
There has to be space in your Roster in order for the Hero to return. If you really want to revive a certain Hero and your Roster is full, you must dismiss one Hero in order to make space.
The revived hero keeps the Resolve level and Quirks they had on death, but all of their skills and equipment will be reset. This means that if you bring back a high level Hero, you will have to spend a lot of gold to fully restore them back to how they were.
This event will not trigger until you have at least 3 Heroes buried in the Graveyard. There are no specific triggers for this event and, while rare, it can occur multiple times in one campaign.
Heroes with the 'Never Again' trait (i.e. Heroes who have succesfully completed a Darkest Dungeon mission) do not lose this trait when they die. As a result, they still do not fill a slot in your roster, and can thus be revived even with a full roster.
Because of the nature of the Graveyard, listed below are the non-hidden achievements related to both the building and hero death. For hidden achievements, please check the Achievements page.