This character, called a “Stalker” is built with a low poly count and only a diffuse map for top performance on mobile. See it in a Unity Web Player; click and drag to orbit and mouse wheel to zoom.
The character is for a top-down strategy game, so he’s meant to be seen from something more like this POV:
Even though this character doesn’t use normal maps, I started off by building it into a high-detail sculpt in ZBrush. My technique used the sculpt to create convincing lighting in the diffuse texture. This approach is based on Dota 2’s character creation techniques.