The v1.1.13 patch broke several popular mods (like the 28 Days Later texture pack), but it introduced better support for .dat file extraction. The community has since released:
One of the most significant changes in v1.1.13 is the re-balancing of Mayors (the random bonuses you get every few days). Prior versions had "trap" mayors that were useless. In this patch: They Are Billions v1.1.13
A single zombie reaching a tent or cottage can infect the inhabitants, turning your entire residential sector into a horde within seconds. The v1
Surviving the Swarm: They Are Billions v1.1.13 – What You Need to Know They Are Billions v1.1.13