The Radio Music you hear from the Radios in Portal.
The music from the ending title credits of half-life 2: Portal.
This is the desktop back ground themes for Portal, some of the best themes for a computer.
I took the Portal wallpapers and put them all together. The "By FJS" isn't on the wallpaper. My mistake. Size: 1280x1024
Still Alive, Portal end credits, High Quality.