Well, if you simply google "best anime games", all you see are mass articles about best anime games with their own opinions. 
We have absolutely zero idea if they are biased, or even paid to advertise particular games by some video game companies for their own marketing purpose and so on.
Also you can't simply determine the best anime games by just a number of sells, as selling can differ by how much marketing effort are made. That means it may be still manipulated by capital. In other words, wh