Blockout, subdivision modeling, low poly, and baking in Blender, handpainted texturing in substance painter using mostly basic round with some dirt alpha for roughness details.
Game ready asset created for a polycount character challenge. ~8k verts
Realtime preview on sketchfab here: https://skfb.ly/DpnO
Original Concept by: Alexander "flyingdebris" Iglesias
http://flyingdebris.deviantart.com/art/Mech-suit-177173677
Man! I really dig this concept!! Awesome work!