The video game which is central to the movie had already been in development as production of the film began (the game then named "Agent X"); when Atari was consulted to provide a game as an element of the movie, they tweaked "Agent X" and renamed it Cloak & Dagger (1983). Dabney Coleman's character was then renamed "Agent X" in the movie. The game saw limited arcade release.
Though The Riverwalk scenes are actually filmed in San Antonio, the Alamo tour scene was recreated in a Universal sound studio because Natives regard the church as a shrine. Due to this, films have rarely featured actual Alamo footage. However, Cloak and Dagger is one rare film that featured actual footage of the Alamo entrance at Alamo East Plaza - especially driving up to the church doors. Ten years after this film's debut, the road was permanently closed to traffic.
The Cloak & Dagger (1983) game screens are mostly from the arcade version, and not the Atari 5200 game console as it would appear in the film. Although an 5200 version of the game was planned, it never was released due to the video game crash of 1983 and eventual sale of Atari. The arcade version of Cloak & Dagger appeared in 1983 prior to the release of the film. Next to the Cloak & Dagger games are boxes for the 5200 version of Tempest. Like the 5200 version of Cloak & Dagger, this game was never released.
The elderly couple in the film, John McIntire and Jeanette Nolan, were actually married in real life for approximately 56 years until his death in 1991.
Because the Atari 5200 version of "Cloak & Dagger" wasn't complete during filming, the cartridge props are actually other 5200 games with a "Cloak & Dagger" label stuck on them. The arcade game was complete by that time, and the signal was piped into Morris's monitor whenever he played. You can actually see the upright game cabinet standing in Morris's computer room when Davie walks over and gets a walkie-talkie off the shelf.