Can i use Penumbra music or will i get a copyright?

[Mudbill]

You're free to use any assets part of Penumbra, Machine for Pigs and, in the future, Soma + other games by Frictional. They gave you the option of making custom stories using their game engine, I don't think they'd EVER ban anyone for using assets from other games they've made. You might wanna have a pointer in your credits as to where the assets come from, but more as a convenience. Otherwise just knock yourself out and go wild. MFP was a collaboration between these two groups. I doubt TCR wanna ruin the fun of reusing these.