The iosl3.0a.so.tar.gz file you have requested: Mods / Multiplayer / International Online Soccer / -Releases / Server Files / Patches / Half-Life: International Online Soccer - Server Patch Linux - 519.53kb 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:
We are pleased to announce the release of IOS Beta 3.0a server patch. This means you only need this if you run a server OR if you play offline with player bots since the patch includes improved bots. You must have IOS v3.0 already installed before applying this patch.