The opfor_i386.so.gz file you have requested: Tools and Utilities / Server / Half-Life: Opposing Force dedicated server 18.104.22.168 - 1.02mb 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 is a compact Opposing Force Linux Server. This server will run Opposing Force Deathmatch, Teamplay and CTF games. To run, it requires the resources from the Opposing Force CD and the latest OpFor patch.