Breakdown:
1. The base was sculpted in Zbrush
2. Armor base was created in Zbrush but restructured in Maya. It's a bit weird making hard surface with just Zbrush so I tend to switch to Maya and detail it later on in Zbrush.
3. The model is Polypainted inside Zbrush.
Note: This is a high-poly model somewhat designed for 3D Printing