Sculpts / Retopo / Hand-Paint / PBR
Those models are low poly modelings or sculpts retopologized. My workflow, detailed on the right, is fairly similar for each asset.
N.B : As Sketchfab WebGL’s viewer is very demanding, don’t forget to close (cross on the top-right corner) windows that are still running.
LowPoly & Sculpt : ZBrush
Retopo and UVs : 3D-Coat / ZBRush / 3DS Max
Baking : Knald / Substance Painter
Painting / PBR: 3D-Coat / Substance Painter
Textures editing : Photoshop / 3D-Coat