Acquiescence
Member
Their name didn't hurt Metal Gear Rising. This may be more of a Transformers thing more than anything else. It doesn't seem to be a strong brand at all in Germany, at least as far as games go. High Moon's games didn't seem to do well either.
I don't think Metal Gear Rising sold particularly well outside of Japan either. The game got price cuts incredibly quickly in the UK, I know that much, and that's always an indicator that a game isn't selling to expectations. It didn't set the NPD on fire either. I remember there being an insider or someone working in the industry who expressed disappointment at the numbers it reached when the charts for that month dropped.
I think it is pretty fair to say by this stage that Platinum Games are commercial poison. They have a string of flops behind them that surely can't be equaled by any other developer. Even when they have the Metal Gear IP to fall back on they can't create a surefire hit.