From the campaign:
Legacy's a game about what comes after the apocalypse. You'll explore a strange new world, find new ways to survive, and rebuild over generations. Think the grand scope of Civilisation, Birthright or Reign, matched with the post-apocalyptic stylings of Gamma World, Horizon: Zero Dawn or Hyper Light Drifter.
Each player controls a family of survivors. The group you control has weathered the chaos and come out the other side changed by the experience. Maybe they've found religion, like the Servants of the One True Faith? Maybe they held on to the technology of the World Before, like the Enclave of Forgotten Lore? Or perhaps they were never human but must live among them in the wasteland now, like the Stranded Starfarers?
Your family will be your constant as your group tells a century-spanning saga of exploration, conflict and evolution. When your family acts together, you trigger special moves that work through the consequences of conducting diplomacy, claiming a resource by force, using subterfuge or many other approaches.
Legacy is episodic. Each age of history, you focus on a particular character from your family. The character playbook you pick gives you a particular skillset and role within the family, but it also gives you a new perspective on the family: a diplomatic Envoy will present a very different side to the Tyrant Kings than a militaristic Sentinel.
A saga across generations. Once you're done telling the story of a particular age, you move the clock on. You go as far forward as the group likes: a decade, a generation, maybe even a century. Over the time skip your family can experience great fortunes or suffer trials, the world can change dramatically, and new threats and opportunities can emerge from the wasteland. Once you've set up your new age you make new characters, able to call on the powers of their ancestors.
The campaign is already over its funding goal with still 28 days on the clock.