-All tiles are 8x8(actually 4x8 cos widthpixel), -Also all tiles share the same 3 global colors (thats the first palette row below each mockup here)-Each tile can have one additional individual color, the twist here is you can only use the first 8 colors for this.
Finally found this .sid :http://hvsc.tp2.be/C64Music/MUSICIANS/A/Ashrilyn/Metroid_Brinstar_Remix.sid