I would like to know if the following situation would be legal.
Let's say I take some pictures on wikipedia, that are licensed under CC-BY-SA license. Then I would like to photoshop them, and use it as art in a (perhaps commercial) game.
According to the Creative Commons licence, it is legal to use the content "for any purpose, even commercially". So I was thinking about creating a web page where I would attribute each picture to the original creator, and publish the photoshoped picture under the same license (even if it would be almost useless for anyone).
Would it be legal? Or would I need to publish the entire game under creative commons license?