If Timbo is unable to identify the license he originally used, I suggest that we don't waste time hunting for the existing sounds, let's just find sounds that we know are open for use. I've started looking through www.freesound.org
and have a few sounds so far. I've started from the top. I don't know if I can get the full compliment of sounds, but I see that not all sounds are being used at present, unless certain maps can call up the additional sounds. The acid tube sound is a little tricky. I noticed that it kinda sounds like a door closing when it's sped up, so I've got a sound similar to it, but without the organic burbling. I'm hoping someone can help with that.
Is there any objection to suggesting new sounds?
Quick question, is there a particular format required for the sounds? Mono/stereo? 44,000kHz, wav/mp3/ogg/flac