The film based on the video game series:
- Actor Allusion:
- Big Name Fan: Believe it or not, Marxist philosopher and cultural critic Slavoj Žižek voted for it for Sight & Sound 's poll regarding the best films of all time. Even the writer of the piece seems confused by this decision.
- Executive Meddling: The infamous "train duel" scene was filmed in a rush after the director was fired over conflicts with the studio.
- Money, Dear Boy: Timothy Olyphant has admitted in interviews that he did the film as a means to help pay for his house after Deadwood was cancelled.
- What Could Have Been: In the near-final script, Agent Markov is revealed as the main villain who wants to replace the President-to-be with an doppelganger loyal to him. 47 is pursued by Spetsnaz (not the other clones), and the whole plan is foiled by Mike (who recorded Markov's confession after slipping one of 47's spy microphones under his lapel). 47 manipulates Markov into shooting the President during Udre's funeral, and then blows him up anyway.
The video game series:
- Big Name Fan: David Bateson rates Silent Assassin as his favorite.
- Defictionalization: Replica "Silverballers" have gone up for bid on ebay.
- Dueling Works: The Hitman series has traditionally gone up against Sam Fischer in the console wars, particularly the first two games. It seems civilians are almost a novelty in Hitman 2 — half of it is almost a military espionage game, anyway, with 47 picking off Russian and Arab terrorists in military-laced levels.
- Mean Character, Nice Actor:
- 47 and Diana on their off-hours.
- Actually, there was a bit during the press conference for Absolution where Bateson was asked what traits he shares with 47, and he jokingly threatened to kill the reporters. "I'm very happy, very well-adjusted."
- Name's the Same: Agent Smith and Agent Smith. Lampshaded in Contracts.
- No Export for You: An odd version. Contracts was unavailable on Steam despite all of the other Hitman games being released on the platform due to a music licensing issue. It has since been added in the Steam store in January 2014.
- Production Foreshadowing: of Deus Ex: Human Revolution. The Anatomy Lesson of Dr. Nicolaes Tulp makes a brief appearance in the opening of Blood Money's "Curtains Down".
- What Could Have Been: Iron Galaxy Studios bet on the right to make Hitman GO and lost, according to CEO Dave Lang although he also states that the end result is probably way better than whatever they would have come up with.
The Game Show:
- Keep Circulating the Tapes: The show hasn't been seen since its cancellation, primarily because the "fact videos" were licensed for one showing each and Wolpert hasn't been able to negotiate new terms.
- What Could Have Been: Jay Wolpert hosted the pilot. When the series was picked up, NBC requested that Wolpert drop 20 pounds and wear a toupee. Wolpert balked and Tomarken was hired to host.