The edge outline effect can be achieved by duplicating the mesh, invert its normal, push it out a little( the further you push the thicker the line is going to get), and apply an unlit diffusion material to it. Or at least that is the trick with Toolbag. :smile:
Totally nailed the borderlands style. How did you do the black lines around the models? For what I see, I'd guess you did a second mesh with a bigger scale, inverted the normals and gave it a black diffuse color. Is that right? Anyways, awesome job!