"This guide is for gamers having issues running Sven Co-op properly on Steam. With a new dedicated server feature to boot, may users have been getting Dedicated server crashes, Steam validation rejected errors, severe lag, and freezing. Here are the top fixes you need to know for Sven Co-op."
Sven Co-op is a multiplayer mod for Half-Life, now available as a standalone game. Graham at GameSpew shares his thoughts.