I soloed the pit of heresy and did not get the triumph. i did not do it all in one sitting but that didn't stop me from getting the triumph for the shattered throne when i did that. i don't know why it did not count
It has to be done by no going to orbit no using check-points so start to finish in 1
Damn, i just did it and the same happened to me... i am here, looking for answers but this is not the one i want.... if only i knew i had to do it in one session, i wouldn’t have spent my time today and i would have wait next week! (PS sry for bad english) :(
-_- It HAS to be in one session. The PIT triumph doesn't function like Shattered Thrown.