The vsv11.exe file you have requested: Modifications / Other Mods / Vampire Slayer V1.1 - 20.74mb 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:
Vampire Slayer is a multiplayer, team-play, modification for Half-Life.Vampire Slayer requires Half-Life v22.214.171.124. When the game starts you choose a team, Vampire or Slayer. The game is played in rounds where the teams have to wipe out the op Version 1.1 of the awesome and atmospheric teamplay mod for Half-Life.