Day Z creator Dean Hall attended Rezzed last weekend, where the player count figure floated around 420k. The day before that is was just 400k. They run 22k concurrent users.
During their off peak time they have around 10k, which are ”pretty huge numbers considering the original data structure and system was designed to handle 100 concurrents, and two servers.”
”Congratulations everyone, with your support through tough times, mistakes, troubles, and technical problems, we now have over 500k users!” twittered the development team.
Day Z is a radical mod for Arma 2 turning the military simulator into a zombie survival sim, with everything to worry about including what intentions other players in the world have towards you. For more info visit the official website.