A group of Half-Life 2 players who loved the TV show Stargate set out to make a HL2 level ("mod") based on the show, but had to stop when MGM, the rightsholder for the show, sent them a legal threat. Nice way to treat your fans.
We are very displeased to announce that apparently MGM the huge company feels very threatened by a group of individuals spread throughout the world. We have received a letter to desist from the creation of the Stargate: Source mod. At this time we are still discussing the issue but it does appear that we are going to be shutting down. Sorry to all of our followers and those who were looking forward to this mod. Personally I will not buy a copy of their game out of protest. It is an unfortunate circumstance when the large, powerful and wealthy must attack the small and free but it happens and it is buisness.
(Thanks, thewebguy!)