Until I Find My Way Back To You: Book 1 by captainwhiteshadow

If you're looking for this since it disappeared during the later half of the last decade, fear not, it's back for a comeback tour! This is perhaps one of his better-known fics, which puts a unique twist to the usual interaction between survivors and zombies in the game. It had a sequel which was never finished. Story is Wayback txt file, presented as found. Credit goes to author.