This is an insertable robot alien which I redesigned and adapted for FDM printers. No where particularly to gain the inspiration, just combine the traditional alien figure I thought could make it cooler. There are 24 pieces all fit together. Here I supply several screenshot on every assembling part so that you can get clear which part you're printing.
Step 1: The Head, Body, Backbone and Waist Parts.
The head is connected with a head pipe.
Step 2: Chest
And there's a pipe connected between the back and the waist.
Step 3: Waist
The two waist parts won't be too hard to fasten.
Step 4: Hooks
Step 5: Legs
The leg and foot parts, assemble carefully by reference to this pic
Step 6: The Guns
Insert the white connection parts into the shoulder joint (joints between the body and the hands)