The ns_install_v1.exe file you have requested: Mods / Multiplayer / Natural Selection / Releases / v1.0 / Natural Selection V1.0 (Windows) - 90.79mb 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 Natural Selection client and server file will ley you to play the Aliens vs. Marines fps/strategy modification for Half-Life.

We recommend you return to the download list and browse the links from there. If the problem persists, contact us with the details.

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