Weighted Companion Cube and Heavy get lost in Vindictus

Hop into Vindictus today and you'll be greeted with an unusual sight: Portal's Weighted Companion Cube and Team Fortress 2's Heavy have somehow been transported into the world of Vindictus and need to find their way back home.  Players who are Level 10 and above can sign up for the "Strange Travelers" quest to help get these two back to their respective dimensions.

Your reward for assisting the two lost souls could be a crowbar weapon, Headcrab hat, or Combine helmet from Half-Life 2.  The event lasts for the remainder of April Fool's Day but the items can be traded off to other players or put up on the auction house.