Aka：無間道II / Infernal Affairs II / Szigorúan piszkos ügyek 2. / 无间道2 / Двойная рокировка 2 / Infernal Affairs - Infiltrados 2 / Volavka II / Infernal Affairs 2 / Infernal Affairs: Piekielna Gra 2 / 무간도 2: 혼돈의 시대 / דרך ללא מוצא 2 / Conflitos Internos 2 / Vô Gian Đạo II / Подвійна рокіровка 2 / 無間道II / สองคนสองคม 2 : ต้นฉบับ สองคนสองคม / インファナル・アフェアII 無間序曲 / Kirli İşler 2 / Afacerile infernale II
Summary：In this prequel to Mou gaan dou (2002), Chan Wing Yan has just become an undercover cop in the triads while Lau Kin Ming joins the police force. Both the triads and the police find an enemy in a rival crime boss.
