I was just lookng for the browser guess what no custom game browser.I get this Error Message when I cant play Social Games an Anti-Cheat Issue because of the file below!
Halo3osdt\Halo3ODST.DLL
So why is that?
UPDATE FIX!!!
Went to steam and validated all the files of MCC PC FOUND NO ISSUES!
Went into Social Games same issue.
THEN:
I am now able to to play social game. ( not that I want to lol ) Here is the fix
I went intothe Halo3osdt folder. Renamed the Halo3ODST.DLL file to Halo3ODST.DLL001 (you can name it anything you want )
and I am able get into Social games area!