I know! That ykfan collection just disappeared from circulation. All of the torrents and direct downloads I found for it had been dead for years.Ahh, thanks to synesthetic for this! I've been trying to get the ykfan archive for ages (the only rip I could remember there being of GotW), but it seems like it's not readily available on the internet any more.
Ah, I just want to mention that Swamper is actually Numachi! ('numachi' (沼地) means 'swamplands' in Japanese, if that helps)
Sinkai (shinkai; 深海) means 'deep sea'. I think I would have preferred this for the Temple of the Sea God, haha. ;v;
Ohh, thank you for the headsup about Swamper. That clears up the confusion I had about it.
Paineity's YouTube of "Swamper" plays Sinkai. (So maybe his collection's missing the real Sinkai.)
I don't know Japanese, but through a Romaji translator I actually saw that "sinkai" is "deep sea", so it confused me why it would've been translated to Swamper in the OST.