Full Release Patch V 1.15.50

Improved zombie AI. (They no longer run past you looking for a target).
Enemies with guns now have to reload when their magazine is empty.
Reduced attack range of enemies with guns.
Added rock formations to environment.
Improved sound replication. (You should now be able to hear other player's footsteps, hear them eating food, etc. all of these sounds are attenuated.)
Fixed enemies being visible through walls when using the lowest draw distance.