Zworld Afterlife is a free zombie survival, which you may have known as Zmod on Gmod from 2008 to 2012. It is the first of its kind long before DayZ, WarZ, H1Z1, Survivor Story.
My references were Resident Evil 1, 2 and 3. And the first three Silent Hills. The suggestions of the players influenced a lot this project, and real life experience was the basis.
This website is translated into two languages, French and English.