I was a core developer on a major feature of Sleeping Dogs/'True Crime: Hong Kong' for 2+ years. At one point, when the game was still being published by ATVI under the title 'True Crime: Hong Kong', ATVI cancelled the game and 100+ developers were laid off including me. Fast forward a few months and miraculously Square Enix decided to pick up the publishing rights for the name, invested a few more months in polish to finish up the title and released it as Sleeping Dogs. I was of course delighted that this canned game saw the light of day and people were able to play it.
In Sleeping Dogs, despite the significant work I put on the project my name appears in 'Special Thanks' instead of being listed as part of the development team. This is very unfair and inappropriate.
Enforcing a clear set of crediting rules would be one of the things that a game developers union could do.