All I wanted was a simple wallpaper with the Aperture Laboratories logo... that's it! But when I searched for it I found little to nothing on DA, and the one I did find had a lowish quality gradient to it. So I went out and made one myself for myself. You guys can have at it and mod it all you want (I license it as CC-0).
Done 100% in the GIMP. Logo is a PD vector pulled from Wikipedia.