Guest Stars Kwon Yoo-joon as Masked Front Man Stand-in Jeon Young Soo voices Game Guide Kim Byung Chul as Instructions Guard Park Hye Jin as Sang Woo's Mother Im Ki Hong as Jung Min-tae Lee Seo Hwan as Park Jung Bae Kim Young Ok as Gi-hun's Mother Jo Ah In as Sung Ga Young Choi Jae Seop as Park Man Cheol Park Si Wan as Kang Chul Yoon Seung Hoon as Park Ju-un Yoon Don Sun as No Sang-hun Yang Mal Bok as Player 453 Kang Mal Geum as Ga-yeong's Mother Min Tae Yul as Player 271 Won Choon Gyu as Player 066 Hyun Jin as Player 209 Park Jung Eon as Player 073 Song Hyung Soo as Doctor Lee Dong Yong as Kim Sang Hyuk So Yun Ho as Detective Yang Hyung Taek as Drunk Lee Jae Sung as Gangster Seon In Ho as Police Detective Go Chang Hee as Hassan Go Chang Hee as Filipino Gangster Anwesha Purkayastha as Ali's Wife Pyo Dong Joon as Ga-yeong's Brother Jang Jae Kwon as Ga-yeong's Stepfather Lee Choong Goo as Gang Member Kim Sung Gon as Detective Kim Kye Sun as Dormitory Owner Kim Min Shik as Kim Jin Woo Joon Hyun Sook as Fish Shop Customer Kim Seo Ha as Factory Owner Kim Young Sun as Gi-hun's Friend's Wife
