Unigine Heaven OpenGL 4.0
Unigine Sanctuary Opengl 3 (<- I'm not sure but i thought that Nvidia can run it with Opengl 2.x but Ati needs Opengl 3.x)
Unigine Tropics Opengl 2.x
Unigine Valley Opengl 4.0
Xonotic Opengl 2.0 (<- The las time i check you even can disable 2.0 and go back to 1.3)
So, no Opengl 4.4 yet, The box stated that the Nvidia driver 331.20 with a Gtx 760 does support 4.4 not that the test are going to run 4.4.
The list above can contains some errors but i'm 100% sure none of the test are 4.4.