Gaffer:
Can someone tell us a bit about it?
https://ufopress.co.uk/our-gam...cy-life-among-ruins/ is a very detailed overview.
At it's core, each player plays a family, each with a particular theme but has some customisation. Each player adds to the game map and setting, such as what made the world end.
You also make a family member, giving you macro playing with the family, and micro when the characters investigate ruins (for example).
You play through multiple ages, as the families and the world changes over time.
You all need to work together to survive, but that doesn't mean it has to happen smoothly...