I've played Dragon Age Inquisition for over 1000 hours, so who knows how many times that is as generally I can co a main campaign in 25-30 hours, I've restarted loads of times mid way through as well. I'd put Skyrim up there. Crash 1 and 2. FF7, 8, 9, 10 12.
While it is MP, I've never played Diablo 3 with anyone, only solo, 600 hours in that.