The Walking Dead: Last Mile

The Walking Dead: Last Mile is perpetually accessible on Facebook as a clickable game that depicts the state of two groups of human survivors in zombie-plagued Alaska.

Users create a human survivor to survey the region, then select points of interest to trigger simple games involving shooting zombies, fixing power generators and more.
Performing well in those games earns players points that can be used to vote for narrative decisions about the fate of the survivor.

Its creators at GenVid call it a MILE, or Massively Interactive Live Event, and pitch it as part of the future of entertainment.