The svencoop19.exe file you have requested: Modifications / Sven Coop / v19 / SvenCo-op v1.9 - 14.15mb 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:
Sven Co-op is a modification that allows co-operative multiplayer (where players fight together against monsters/etc.) in Half-Life. It also adds some features to make co-op play more interesting.