A special question about sounds and sound effects

[Dismortal]

Hello

This question is a little bit difficult. If the sound collection from the game is not enough, is it allowed to use sounds and music that is released under creative commons for a costum story? Especially by the law and by frictional games?

[Alienchild]

You can add whatever content you want as long as you have written consent by the owner of the material (like for instance the CC agreement you refer to).