Hard to say as flop is generally proportional to budget and expectations versus reality. I never thought Beyond would do gang busters, but that it could have solid legs similar to Heavy Rain. After playing Heavy Rain (which I purchased well after release for $15) I felt that while it was a good experience it did not warrant $60 day one. Once Beyond gets down to price of a DVD, $15-$30 range, I think it will see a bump and settle doing okay breaking the million mark and being mildly profitable.
For me the biggest flop of 2013 has to be Overstrike becoming Fuse to "appeal to a broader audience" and absolutely crashing and burning. I admit I was in the camp really put off by the tonal shift, but it did surprise me how badly it went over given EAs marketing resources. No matter what they did no one seemed remotely hyped about that game. I saw it for sale at $30 within weeks of release and that is where it dropped every where not long after.
