Adaptation after adaptation from video games, the only good adaptation was Silent Hill. When I heard that Hitman was going to be turned into a live-action movie, I was quite excited. The way I viewed was a Michael Mann type espionage thriller, not an action movie. Unfortunately, the filmmakers saw it as an action movie. They changed from 47 being a clone to an orphan. . . . why? To be different? The director said "I'm a fan of the games", if he didn't say that. . . . I would have given this movie a fair review. The script was terrible, especially with the line "the Agency is so secret, no one knows it exists". . . . then who hires 47? The other Agents are supposed to look like 47, not different bald people. Olga Kurylenko was quite bad in the role, but I'll give her a chance for Quantum of Solace since Hitman was her first acting role. The fight scenes were poorly choreographed. Being faithful to the source material? Only to the look of 47, Timothy Olyphant was okay but would have actually been better if it was played by David Bateson (the voice of 47 in the video games and the person who the creators based his facial appearance on). The music was another let-down. Jesper Kyd's music in the games is terrific, making Hitman's world dark, brutal and gothic. But instead changed it on having it trying to be like Bourne and Bond.
My advice? Play the games, THEN (rent or download) watch the movie. Just to see how Xavier Gens (his first directorial debut. . . . not promising) really screwed it up from what could have been great.