So when ever I launch TF2, I get this error, so obviously, it won't launch.
"Required OpenGL extension "GL_EXT_texture_compression_s3tc" is not supported. Please install S3TC texture support."
Look, I'm new to linux, so please, give me step by step instructions on how to install S3TC or what ever. PLEASE do not link me to another discussion, they didn't help me. Seriously. I have no idea what I'm doing on here.