Ripped from my PP thread on the same topic - they said I should ask here
How legal is it to use content from say - op4/BS in your mod? I've seen a lot of mods do it, but I've always wondered if it would lead to serious repercussions or not.
The last thing I want is an angry letter from valve!
By content, I mean sounds, models, textures.
I'm pretty sure it's OK if the end user owns the content and is required to copy and paste it into the mod directory.
Thank you