I've to tell you that the version that you can see in those image is the 4th one. The first 3 versions didn't make it pass the legs. The first version was the one that use to make the How to make chainmail with putty tutorial.
Mattias Darrow ask me if I could show how I make the legs in another tutorial but that is quite tiresome for me so instead I'm going to show you the pictures step by step. At the end, with two or three techniques you can make anything with putty or green stuff and I've already explain all the techniques that I used in other tutorials.
In the 1st version of the Chaos Warrior I started doing the feet and latter building the armature for the legs and the lower body with pieces of sprue on top of them. (the picture showing how I made the feet is actually from the second version but I didn't have one of the first and they were quite similar).