Hard Hit (Korean: 발신제한; Hanja: 發信制限; RR: Balsinjehan; lit. Restricted Call) is a 2021 South Korean action thriller film directed by Kim Chang-ju and starring Jo Woo-jin, Lee Jae-in and Ji Chang-wook. The film depicts the unpredictable circumstances the members of an ordinary family have to deal with after a mysterious phone call puts them in a horrific situation. It is a remake of Retribution, a 2015 Spanish action thriller film directed by Dani de la Torre.

The film was theatrically released on June 23, 2021. The film was a hit, crossing the 500,000 viewer mark on the 10th day of its release, which was the first for a Korean film in 2021. As of December 22, 2021 it is the fifth highest-grossing Korean film of 2021 and ranks number 17 among all the films released in the year 2021 in South Korea, with a gross of US$7.70 million and 955,809 admissions.