This Challenge requires you to kill Constructors, which are the large Hyperion machines that can build new robots. These enemies are kind of rare, since you don't fight too many of them during a single playthrough of the game.
- Rank 1: Kill 5 Constructors
- Rank 2: Kill 12 Constructors
- Rank 3: Kill 20 Constructors
- Rank 4: Kill 30 Constructors
- Rank 5: Kill 50 Constructors


