In the Test Out Your Clones mission from Leonard, when you talk to Dr. Higgins, select "Send out all 8 of the Clones", and verify your choice. All teammates will receive the badge upon defeat of the final clone.

The mission is given by Leonard, who is introduced after completing Dean MacArthur's arc, or as a Flashback arc, under "Good Villains Never Die" in the Undesirable (Level 25-29) section.