Noshowers on 22 June 2014
There is no set number. It's all about the money, so turning a profit makes the venture a success. This goes for consoles, games, movies, television series, T shirts, websites, every other product under the sun.
You might see people call things failures for many reasons (expectations, one brand having a bigger marketshare then the other, someone is just a bigger fan of something else instead, etc), but if they are profitable that's all that matters.
