The bg-demo-1.0-1.1.exe file you have requested: Mods / Multiplayer / Battle Grounds / -Releases / *Patches / Battle Grounds Demo 1.0 - 1.1 Patch - 18.13mb 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:
1.0 -> 1.1 update for the Half-Life Battle Grounds modification. Windows version.