The Steam Page for Counter-Strike Nexon: Zombies is online, revealing a September 23rd launch date for Nexon's free-to-play zombie shooter. This announcement clarifies this will still be considered an open beta, and outline more of what to expect:

A huge number of modes will be available, featuring both PvP and PvE gameplay. Possess and use, to a dangerous effect, the various unique abilities in Zombie Hero; lead a team of survivors to build and defend a base against continuous waves of zombies in Shelter Mode; or advance through intense Zombie Scenarios that will throw players into boss fights, among other activities. Even outside of zombies, there are more than 20 modes to explore, such as Beast Mode, Bazooka Mode, and Football Mode. Veteran fans of the Counter-Strike series will also surely be glad to see a number of offerings from the original iteration, such as Bomb Defusal and Hostage Rescue.