The ns_v2_dedicated_server.zip file you have requested: Modifications / natural selection / v20 / Natural Selection 2.0 Dedicated Server - 4.28mb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
This zip file contains only files for running a dedicated server. It will not function properly as a client. It is not for users who want to play NS, it is only for NS server admins. Get the Natural Selection 2.0 Dedicated Server files. This file contains the NS 2.0 Win32 and Linux Dedicated Servers.