Concepts for the Swarmer enemy unit. Utilizing design ques from the Imperium tank seen in the film, it was a modifiable enemy unit with different attachments that became the Sapper, a moving proximity mine that explodes close to hero units.
Initial thumbnail sketches
rough attachment concepts
Base Swarmer designs
Arm attachment concepts
Gun Turret attachment concept
Rocket launcher attachment
Flamethrower attachment concept
The sapper became the core purpose of the Swarmer, a moving, proximity mine.