I Watch Dogs Legion kan du rekruttere og dermed spille som alle karakterer der eksisterer i spillets udgave af London, og én af grundene til at man gør er på grund af de ekstra lag af variation man får igennem et konstant udskifteligt cast. Men det kræver naturligvis at de hver især er troværdige.
Måler man på mængden af variationer i selve manuskriptet, så må man sige at de har arbejdet hårdt. I et interview med EDGE Magazine (udgave 334) fortæller instruktør Clint Hocking følgende:
"There's no dude on the box who's there to start all the cinematics and the people you recruit are just the supporting cast. There are 20 different versions of Legion's script and I don't just mean people saying the same lines. We're talking different characters, different personas, different voices, different acting."
"We're using technology to alter all the voices so that even if you happen to recruit Joe and John and they have the same actor and the same personality when they talk to each other, you won't know it's the same actor because we modulate the voices. We used photogrammetry to capture dozens of different faces, which have been combined using innovative animation techniques to produce literally thousands of unique heads."
