H. Porter was a scientist that was a member of the secret Group 935, and invented the "Porter's X2 Ray Gun", the "Porter's X2 Zap Gun", and the "Porter's Mark II Ray Gun", Pack-a-Punched versions of the Ray Gun, Wave Gun, and Ray Gun Mark II, respectively. He is heard in a radio in the map Der Riese. According to the zombies timeline, as the zombie outbreak begins at the Der Riese facility, Porter activates an alarm before taking a cyanide capsule. He was mentioned in several documents by Dr. Vannevar Bush. Richtofen mentions him in "Moon" when the player obtains the Pack-a-Punched Wave Gun. He is also mentioned in Call of Duty: Black Ops 4 in a film reel on the map Tag der Toten, where Richtofen assigns him to work on reverse-engineering the broken Pack-a-Punch Machine parts found at Purgatory Point.
- Porter's name is a reference to the Treyarch developer Max Porter, who designed the original Ray Gun.
- In the timeline, Porter is said to die from a cyanide capsule. However, in the respective radio from Der Riese, Porter says he cannot find his pills, and is heard choking together with the sound of a chair scarping (according to the Vbush files), as if he hung himself.
- The Group 935 manual by Ludvig Maxis mentions these cyanide capsules: "In the event of any critical failure, you are instructed to take your cyanide tablet that's included in your field operations kit. In the event that you have misplaced yours, there are several methods that will accomplish the same task."