[silikone]

Which notable games have support for HRTF in software? The only I know of are games using OpenAL, but even then, the games don't support HRTF directly, an external library does.

 

[NamelessPFG]

I wish I could name some myself, but even I can't think of a single one.
 
Battlefield 3/4/Hardline Enhanced Stereo Mode needs more verification, and anything that uses AstoundSound is inherently disqualified if the enhanced audio has no CPU fallback without an AMD TrueAudio card.
 
That may change as this plugin takes off for Unity-based games:
 
http://realspace3daudio.com/

 
I'm actually kinda astounded that binaural audio is only now making something of a mainstream push, and it's all due to the resurgence of VR more than anything.

 

[silikone]

I totally forgot about the AMD sound technology.
Frankly, it's dumb to push something new now. Hardware accelerated audio is sadly already a niche that is losing to software, and splitting that market in two is just going to kill it faster.