Knightmare Frame Guren MK-II from Code Geass Lelouch of the Rebellion Lost Stories. It's made directly from the game files. It's size is roughly the same as an HG gundam model. I recommend using PETG or ABS for everything. Some parts may need some sanding to fit. 

You can glue the parts that doesn't move

Assembly

Main

Left arm

Right arm

Leg 2x. glue will be needed for the "wheel" of the foot