When DayZ, a buggy, unfinished, and unforgiving zombie apocalypse simulator, shot to prominence early this year, it became known as one of the most difficult and realistic survival games around. Now, inspired by the success of DayZ and similar games, it’s begun a quarter-million-dollar Kickstarter campaign to completely remake its very first work — an ambitious but deeply broken 2005 role-playing game called Pathologic. Pathologic, unlike DayZ, is single-player, but it offers its own brand of apocalyptic survival.