In reality, I think this claim from AMD is pretty much unfounded - NVIDIA has long been accused of doing things like this but AMD has similar relationships with developers - see games like Battle Forge, DiRT 2 and Tom Clancy's H.A.W.X.
Nonsense. Working relationships with devs are NOT what these issues are about, its about extending TWIMTB Payed from working with devs to support certain features (which is totally fine),
to deliberately harming opponent (and players). Call me when AMD forced devs to remove something like DX10.1 if they didnt had it themselves, or to disable AA to harm performance and quality for gamers with opponents cards, or to disable features if other manufacturers card is detected. NONE of that has happened yet AFAIK, therefore Ryan Shrout claim is baseless.
In the case of Batman's AA support, NVIDIA essentially built the AA engine explicitly for Eidos - AA didn't exist in the game engine before that. NVIDIA knew that this title was going to be a big seller on the PC and spent the money/time to get it working on their hardware.
Now he is lying, and not because AA "didnt exist in the game engine", but because "it didnt exist
before that" and "NVIDIA essentially built the AA engine explicitly for Eidos". Both bogus claims. AA was implemented and run fine on ATI cards on xbox360 (Nvidia had zero to do with it)
and run just fine when ATI block was removed on PC port as well. Therefore AMD didnt even had to "implement" something that wasnt there, all Rocksteady had to do is
to enable the feature already in place.
Eidos told us in an email conversation that the offer was made to AMD for them to send engineers to their studios and do the same work NVIDIA did for its own hardware, but AMD declined.
I dont believe for a second AMD refused to cooperate with devs, it makes no sense whatsoever. Either it didnt happened, or was done in a wrong way. I.e. if mail says something like this "Nvidia helped us with PhysX, why dont you do the same? CUDA is cool, implement on your cards", then I wouldnt be surprised if AMD declined