Any objections to walking-dead-survival, or perhaps better ideas on what the tag should be? Given that this is the first question about the game on the site, I don't think it's going to be a wildly popular tag to begin with. I'm also happy to make the tag wiki for it, once created, whatever it ends up being.
After a tentative Google search, I have discovered that twd-survival-instinct would give us the "Google juice" that we need. So I'd suggest that.