The ns_atomicmass21.zip file you have requested: Mods / Multiplayer / Natural Selection / Maps / Old / NS Atomic Mass - 2.4mb 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:

The returning deepspace explorer AtomicMass has been found to be infested by the alien menace. The crew have been evacuated and frontiersmen called in.

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

More games Add game