Betrayal Legacy marries the concept of Betrayal at House on the Hill — exploring a haunted mansion — with the permanency and multi-game storytelling shown by Daviau's Risk Legacy and other legacy games that followed. Betrayal Legacy has a prologue and a 13 chapter story that plays out over decades. Players represent families, with certain members of a family participating in one story, then perhaps an older version of those characters (assuming they lived) or their descendants revealed in later stories.

Why would people continue exploring a haunted mansion for decade after decade, especially when horrible things happen there? Curiosity, one guesses, or perhaps an ignorant boldness that comes from the belief that we know better than those who have come before. Look at everything we've learned, marvel at the tools we have at hand! Surely we will all leave safely this time...