Isometric Pixel Art Guide
Bound to happen with search results like these, I guess.
Update: This tutorial has been removed due to a DMCA claim against the content.
Rhys Davies has filed a DMCA claim against the content of this tutorial, as it uses the images from his original 2004 tutorial.
I rewrote his original guide and presented it here, with full credit, because I felt it was an excellent learning resource, albeit needing work on grammar. As a service to the art community, I completely rewrote the content, added information, but used the same images from the original tutorial. I figured with full credit and a reasonable attitude (would have taken it down any time, had I been asked), it wouldn't be a problem. I was wrong, but it happens.
As a result, I am forced to remove the tutorial from this website. I may redo the guide in the future, but in the meantime, there are many isometric pixel art tutorials out there, or you can buy Rhys Davies' guide for (currently) $5.95 as an ebook, or $42.90 (!) for a paperback edition.
Alternatively, please enjoy any of my other fine Photoshop tutorials. Thanks!