Critical response
On review aggregator website Rotten Tomatoes, 46% of 227 critics gave the film a positive review and an average rating of 5.5/10; the site's consensus states: "Despite solid production values and an intriguing premise, Constantine lacks the focus of another spiritual shoot-em-up, The Matrix". On Metacritic, it has a weighted average score of 50 out of 100 based on the reviews of 41 critics, indicating "mixed or average" reviews. Audiences polled by CinemaScore gave the film an average grade of "B" on an A+ to F scale.
Richard Corliss of Time magazine called the film "a one-of-a-kind hybrid: a theological noir action film". He cited Keanu Reeves' ability to "retain his charisma in a weird-silly moment" as proof that he is a "movie star", and referred to Tilda Swinton as "immaculately decadent". Corliss also praised the variety of camera placements employed by Francis Lawrence. He was, however, critical of the climax of the film, referring to it as "irrevocably goofy".
Ella Taylor of LA Weekly wrote: "Constantine, which opts in the end for what I can only describe as a kind of supernatural humanism, is not without its spiritual satisfactions". Carina Chocano of the Los Angeles Times said that "Keanu Reeves has no peer when it comes to playing these sort of messianic roles—he infuses them with a Zen blankness and serenity that somehow gets him through even the unlikeliest scenes with a quiet, unassuming dignity".
Pete Vonder Haar of Film Threat gave the film three stars out of five, writing that "the film (barely) succeeds, thanks to impressive visuals, the idea of an uncaring God wagering with Satan for souls, and two immensely enjoyable scenes (one with Weisz, one with Stormare) in which Reeves actually plays his character as the cynical asshole he really is".
Jack Mathews of the New York Daily News gave the film 2 out of 4 stars: "For all its spiritual angst, Constantine is about as silly as fantasies get". Michael Sragow of The Baltimore Sun also gave the film 2 stars out of 4: "It all comes off as a case of filmmakers wanting to have their communion wafer and eat it, too". Desson Thomson, a writer for The Washington Post, had similar sentiments of the film, specifically criticizing its differences from the comic book:
If you are a fan of the Hellblazer comic book series, on which this movie is based, you'll definitely need a distraction. The relation between Constantine and its source material is, at best, superfluous. The disparity starts with the original John Constantine (Reeves's character) being from Liverpool, England. Reeves from the city of John and Paul? As if.
Leonard Maltin's annual publication Movie Guide gave the film a BOMB rating, describing it as "dreary, to put it mildly". Film critic Roger Ebert gave it one and a half out of four stars, panning the depiction of Hell ("a post-nuclear Los Angeles created by animators with a hangover"), the premise of the film itself ("you would think that God would be the New England Patriots of this contest, but apparently there is a chance that Satan could win"), plot holes, inconsistencies, and general actions depicted throughout the film. He was not particularly critical of the acting, only mentioning it by stating: "Reeves has a deliberately morose energy level in the movie, as befits one who has seen Hell, walks among half-demons, and is dying. He keeps on smoking". Ebert added the film to his list of "most hated" films.