Just a quick note regarding Agony's intro music...
from
http://en.wikipedia.org/wiki/Agony_(game)
Norwegian black metal group Dimmu Borgir used the popular title tune for the track Sorgens Kammer on their 1996 album StormblÄst without crediting Tim Wright, the original composer of the tune. Wright later contacted the band, citing a breach of copyright. It transpired that Dimmu Borgir's keyboard player had lifted the track without informing the rest of the band of its origin. This track was not included in later releases of the album.