File:Portal open.ogg

Ripped directly from game files, thanks to 'Scribblenauts Unlimited Unpacker' by GMMan found here: https://forum.xentax.com/blog/?p=1108 and 'BinkA2Wav' found here: https://forum.xentax.com/blog/?p=1115 Resulting WAV files were converted to .ogg with fre:ac found at: https://www.freac.org/