The zip file contains the obj model file, the mtl for it, readme (same as here) and 256^2 texture (png).
Attribution Instructions:
Original pixel art by Tracey - http://opengameart.org/content/impy-hat
This work by Grefuntor/Atmostatic - if you feel like it, you can link back to me (http://atmostatic.blogspot.com/)
Comments
Original was CC-BY
This is a great adaptation! I really like what you've done with it.
@Botanic: I think that it may be compatible licensing for a derivative work, since credit is preserved, but that may be wrong.
Oops Botanic, your right, I misread it, changed it to CC-BY