Director Gareth Huw Evans’ follow-up to the sleeper hit “The Raid” (2011) ups the ante for violence, blood and outright outrageous gore. Babyfaced cop Rama (Iko Uwais) — who fought his way out of a building filled with gangsters and madmen in the first film — goes undercover as an enforcer for a local mob boss to get evidence linking the mob to corrupt government officials. The body count soars as Rama first fights his way into the gang, then single-handedly fends off another group of gangsters who want to take over his mob’s territory. “Raid 2” features some of the best martial arts action — and gore — you’re likely to see on the screen — rivaling the best of Bruce Lee, Jet Li, Jackie Chan, Takeshi Kitano, Yuen Woo-ping, Takashi Miike, Kinji Fukasaku and the “Ip Man,” “Ong Bak” and “Kill Bill” films. Any film that creates a killer like the “Hammer Girl” has to be taken very seriously. Extras: English dub in addition to the original Indonesian language version of the film; director commentary with Gareth Huw Evans; featurettes: “The Next Chapter: Shooting a Sequel” and “Cinefamily Foundation Q&A with Gareth Huw Evans, Iko Uwais & Joe Trapanese.” Blu-ray adds “Gang War” deleted scene; featurettes: “Ready for a Fight: On Location” and “Violent Ballet: Behind the Choreography.” Vitals: Director: Gareth Huw Evans. Stars: Iko Uwais, Cok Simbara, Tio Pakusodewo, Arifin Putra, Julie Estelle. 2014, CC, MPAA rating: R, 150 min., Action, Box office gross: $2.586 million, Sony.