| Country | Title | Year | Avg. (nb) | ||
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| Hong-Kong | On Fire | 1996 | 1 (1 Reviews) | ||
| On His Majesty's Secret Service | 2009 | 3.2 (5 Reviews) | |||
| On Parole | 1993 | 2.83 (3 Reviews) | |||
| On Parole 2 | 1993 | 3.25 (2 Reviews) | |||
| On the Edge | 2006 | 3.5 (24 Reviews) | |||
| On the Run | 亡命鴛鴦 | 1988 | 3.71 (39 Reviews) | ||
| On the Wrong Track | 毁滅號地車 | 1983 | 3.5 (3 Reviews) | ||
| On Trial | 失業生 | 1980 | 3 (2 Reviews) | ||
| Once a Black Sheep | 1992 | 2.88 (2 Reviews) | |||
| Once a gangster | Fei saa fung chung chun | 2010 | 2.67 (6 Reviews) | ||
| Once a Thief | 縱橫四海 | 1991 | 3.16 (66 Reviews) | ||
| Once in a Lifetime | 1995 | 3 (1 Reviews) | |||
| Once upon a Mirage | 1982 | 2.5 (1 Reviews) | |||
| Once Upon a Rainbow | 1982 | 3 (1 Reviews) | |||
| Once Upon a Time a Hero in China | 黃飛鴻笑傳 | 1992 | 3.38 (6 Reviews) | ||
| Once upon a time in Shanghai | 惡戰 | 2014 | 3.1 (5 Reviews) | ||
| Once Upon a Time in Triad Society | 1996 | 3.42 (12 Reviews) | |||
| Once Upon a Time in Triad Society 2 | 1996 | 2.93 (7 Reviews) | |||
| One armed swordsman against Nine killers | 1976 | 0.83 (3 Reviews) | |||
| One Husband Too Many | 一妻兩夫 | 1988 | 2.5 (1 Reviews) | ||
