So many times have i beaten par scores in halo 2 levels aswell as in halo 3 but the -Yoink!- chievo wont pop up. Its so frustrating. -Yoink- like that should simply not happened. They (343) had enough time to fix those & lot other issues. IT SUCKS BIGTIME
Feel free to leave any reports about achievement issues in the pinned thread in the main MCC forums