Portal 2 : The Core (Music by Osman Arabi)

Portal 2 mod 'The Core' by CosmicD. Excellent mod. Get it from ModDB or Thinkingwithportals. Original audio stripped out and replaced by the awesome Snakes, Lizards and Shamans by Osman Arabi available for download on his Soundcloud profile. I thought it fit this really well :)