Deborah Young at THR:
"Little logic prevails over the final action sequences, which take place near the speed of light. Just when Zeng Jing is overcome and all looks lost, her clumsy husband retrieves his rusty sword and reveals his true identity. His heroic transformation doesn't come as much of a surprise, but it is an exhilarating moment that makes the last scenes exciting as well as touching, when the husband and wife open old wounds, fight each other and test their love and spirit of self-sacrifice…The ending is moving and poetic, confirming the acting depths of the two principals, who are much more than martial-arts stars. Another nod goes to the character actors, who round out the film with unexpected humor. Like the cast, the top-grade technical staff comes from all over Asia."
Guy Lodge at InContention:
"Indeed, while a number of pejoratives could be applied to Su Chao-Pin and John Woo’s elaborate martial-arts fantasy Reign of Assassins – silly, plasticky, just barely acquainted with notions of narrative coherence – “dreary” is not among them…Reign of Assassins lacks the technical grace and advanced set-piece conception of, say, Woo’s Red Cliff but it does boast a goofy sense of humor, as well as a certain elasticity of genre as endearing as it is initially bewildering: this is the rare fighting film that takes sideways strolls into supernatural video-game territory and meet-cute rom-com…The stupid dial is turned way up – this is a film where actors deserve bouquets for belting out dialogue like “Let me reap the consequences of karma!” without corpsing – but so is the good humor, and that counts for everything in a bauble like this."