Stemage is a song-writer who has written some really awesome game related songs. He has also done some more nerdstuff (see more awesome stuff over at his website)
I found him way back when with Metroid Metal. Unfortunately Spotify does not have the complete selection of his work, so lets hope that changes.
(Update: Varia Suit is now on Spotify, check link below Expansion Pack)
He also helped out on two songs with VikingGuitar, will write up a post on VikingGuitar later on.
VikingGuitar – Made of Metal
VikingGuitar – Vikingguitar