I didn't do it, because it's way too depressing for now. It depends on the days, though, some days I can't even get it done once, when some other days I just slowly and steadily make something more than 6 games finished out of 10. I def should try it next time I get to the Pier21 center, make statistics and all! EDIT : However I did not realize your question was about a time average, covering other modes as well. That's interesting too, since my survival rate is way higher for TAP and TGM3, so I should give this a try very soon!