Critical response
On the review aggregator website Rotten Tomatoes, 93% of 275 critics' reviews are positive, with an average rating of 8.1/10. The website's consensus reads: "As thought-provoking as it is thrilling, Looper delivers an uncommonly smart, bravely original blend of futuristic sci-fi and good old-fashioned action." On Metacritic the film has a weighted average score of 84 out of 100, based on 44 critics, indicating "universal acclaim". Audiences polled by CinemaScore gave the film an average grade of "B" on an A+ to F scale.
James Mottram of Total Film gave Looper 5 stars out of 5, concluding that it was "the best sci-fi movie since Moon. The best time-travel yarn since 12 Monkeys. And one of the best films of 2012."
Todd McCarthy of The Hollywood Reporter gave the film a positive review, calling it "an engaging, neatly worked-out time-travel sci-fi thriller", but also criticizing the effects involved in making Gordon-Levitt resemble Willis: "At first, the effect is a bit odd, and you can't quite put your finger on what's off; then it feels downright weird to be looking at a version of Gordon-Levitt who is no longer the actor you've known for a few years now."
Peter Debruge of Variety also gave the film a positive review, writing that writer-director Johnson's "grandly conceived, impressively mounted third feature shows a giddy, geeky interest in science-fiction, then forces it into the back seat and lets the multidimensional characters drive. In a genre infamous for loose ends, this thinking man's thriller marshals action, romance and a dose of very dark comedy toward a stunning payoff."
Kim Newman of Empire magazine gave Looper 5 stars out of 5, writing, "Intelligent science-fiction sometimes seems an endangered species—too much physics and there's a risk of creating something cold and remote, too many explosions and get lost in the multiplex. Looper isn't perfect, but it pulls off the full Wizard Of Oz: it has a brain, courage and a heart." Noel Murray of The A.V. Club gave the film an A− grade, writing, "Looper is a remarkable feat of imagination and execution, entertaining from start to finish, even as it asks the audience to contemplate how and why humanity keeps making the same rotten mistakes." Kenneth Turan of the Los Angeles Times gave the film a positive review, writing, "Looper is way inventive but it wears its creativity lightly, like it's no big deal. This is a highflying, super-stylish science-fiction thriller that brings a fresh approach to mind-bending genre material. We're not always sure where this time-travel film is going, but we wouldn't dream of abandoning the ride."
Claudia Puig of USA Today gave the film 3.5 stars out of 4, writing, "Looper's heady blend of time travel, gritty action and a jot of romance is such a thrilling and cerebral mind-bender that it will likely have moviegoers gathering outside the theater afterward to hash out details of its intricately constructed universe. Not that that's a bad thing." Peter Travers of Rolling Stone also gave the film 3.5 stars out of 4, praising the performances of Willis and Gordon-Levitt and concluding, "Lacing tremendously exciting action with touching gravity, Looper hits you like a shot in the heart." Roger Ebert of the Chicago Sun-Times also gave the film 3.5 stars out of 4, praising its screenplay, stating "Looper, a smart and tricky sci-fi story, sidesteps the paradoxes of time travel by embracing them. Most time travel movies run into trouble in the final scenes, when impossibilities pile up one upon another. This film leads to a startling conclusion that wipes out the story's paradoxes so neatly it's as if it never happened."
Lisa Schwarzbaum of Entertainment Weekly gave the film a B+ grade, writing, "The time swivels in Looper evoke some of Inception's fancy temporal tricks (some of which, of course, also involved Gordon-Levitt straddling multiple time zones at once). But it's the glimpses of Children of Men-like societal dystopia that give the movie its real weight". Keith Staskiewicz, also writing for Entertainment Weekly (reviewing the DVD) and also giving a "B+", said, "The film's premise is markedly inventive, and [writer-director Rian] Johnson spends a lot of time making his universe seem lived-in and believable, but he's not just concerned with whiz-bang what-ifs. The showdown of selves illuminates just how little Gordon-Levitt's character has changed over the intervening years, stuck as he is in a feedback loop of drug use and violence despite his pipe dream of moving to Europe. The retro trench coats and firearms also suggest a sort of eternal recurrence, and as Looper's plot gets more complex, its central question simplifies: If we can't fix our mistakes, can we at least make sure we don't repeat the same ones over and over again?"
Richard Corliss of Time magazine gave the film a positive review, calling Looper a "hybrid, mashing Quentin Tarantino and Philip K. Dick into a species of pulp science fiction" and also writing, "A fanciful film with the patina of hyper-realism, Looper is well served by actors who behave not as if they were dropped carelessly into the future but spent their whole desperate lives there." Dana Stevens of Slate gave the film a mixed review, writing, "Looper felt to me like a maddening near-miss: It posits an impossible but fascinating-to-imagine relationship – a face-to-face encounter between one's present and future self, in which each self must account for its betrayal of the other – and then throws away nearly all the dramatic potential that relationship offers."