- Union Jack was confirmed at New York Comic-Con on October 13, 2012.
- Union Jack's teaser silhouette was shown on Facebook on April 21, 2013, and officially revealed on April 22, 2013.
- Union Jack was officially released for general recruitment on the April 23, 2013.
- Union Jack's preemptive counter attack is named Royal Arms, deals 1-hit Ranged Gun.
- Union Jack's passive uses Service Revolver as an attack.
- Despite being credited as James Falsworth, the first Union Jack, the playable Union Jack carries Joseph Chapman's, the third Union Jack, weapons (gun and silver dagger) and informs the Agent to call him Joey
- The second Union Jack, Brian Falsworth, is chronologically the first homosexual hero