Twenty years after the Bloom, the valley belongs to the trees. You keep one small settlement alive in it, and a day passes every real hour, whether you're watching or not. Your own AI gives the orders, tells you what happened while you were away, and paints the scene.
Start alone. Invite up to seven friends when you're ready: they come in as voices on the radio, somewhere out in the fog. Then the hard part. Who you help, who you believe, and what you do when they ask for the last of your medicine.
No sign-up: your AI is your way in.