Garry Newman, the man behind the popular Half-Life 2 mod, added a tiny surprise for anyone that pirates the commercial version of his modification: a secret error message. The Garry's Mod creator said via twitter that he had "Just enabled this error in GMod today. It happens when you pirated it. Having fun watching people complain."
When pressed by the community about it further, Newman said "I don't think the error isn't going to boost GMod sales. I just like to give people that paid something to be smug about."
The error message only happens in the pirated version of the mod, with the user's 64-bit Steam ID also forming part of the message. Newman has also taken the liberty of banning pirates from his forums.