on the official Portal 2 website you can download the whole soundtrack of the game for free. As far as I could make out there is no licensing information.
I was wondering if I can use this music for non-commercial purposes while crediting the creators. For instance, when showing a free of my game in Unity Webplayer I could add a sentence below the player. Is that allowed? Would you have to contact valve to know for sure?
EDIT: I have found a couple of threads about this topic here, here and here, but they are all speculative.
Of course they’re speculative, if you want to know about something, ask the licensor, not a random unrelated forum.
However it is to be expected that the answer is no, you can’t use it for anything except listening to it, actually unless you contact them, the answer IS no, if there was no license, you haven’t been licensed any rights at all, licenses don’t restrict rights, you have no rights by default and they grant and modify rights, so no license = no rights, contact valve before doing anything.
No, they’re 100% not free for you to use. They’re free for you to download and listen to. That’s all. If something is free to use in your own projects it will contain a royalty free disclaimer.
You’re thinking arse backwards, where if there’s no disclaimer its free. That’s not the case, and hasn’t EVER been the case with anything.
Don’t find a disclaimer? it’s not free for you to use. Simple as that.
Unless they provide you with licensing information, assume that you don’t have the right to redistribute it or use it for your own work. Valve probably released this for marketing purposes and not so that people can use it for their own projects.