The Game: Towards Zero

Composer

• 
  Jung Se Rin

Director

• 
  Jang Joon Ho

Screenwriter

• 
  Lee Ji Hyo

Main Role

• 
  Ok Taec Yeon

  Kim Tae Pyung / "Jason"

  Main Role
• 
  Lee Yun Hee

  Seo Joon Young

  Main Role
• 
  Im Joo Hwan

  Goo Do Kyung

  Main Role

Support Role

• 
  Park Ji Il

  Nam Woo Hyun [Chief of the Central Police Department]

  Support Role
• 
  Choi Jae Woong

  Han Dong Woo

  Support Role
• 
  Shin Sung Min

  Yoon Kang Jae [Detective at Crime Division One]

  Support Role
• 
  Lee Seung Woo

  Ko Bong Su [Detective at Crime Division One]

  Support Role
• 
  Lee Bom

  Ji Su Hyeon [Crime scene investigator]

  Support Role
• 
  Park Won Sang

  Lee Jun Hee [Reporter / Captain at Hana Daily News]

  Support Role
• 
  Hong In

  Park Han Gyu [Reporter at Hana Daily News]

  Support Role
• 
  Yoon Ji Won

  Oh Ye Ji [Intern at Hana Daily News]

  Support Role
• 
  Jung Dong Hwan

  Teacher Baek [Tae Pyung's teacher]

  Support Role
• 
  Ryu Hye Rin

  Lee Yun Hwa [Tae Pyung's lawyer / Secretary]

  Support Role
• 
  Jang So Yeon

  Yoo Ji Won [Jun Hee's wife]

  Support Role
• 
  Choi Kwang Il

  Kim Hyung Soo

  Support Role
• 
  Lee Won Jin

  Gu Do Kyung

  Support Role
• 
  Uhm Yoon Jung

  Choi Hye Young

  Support Role
• 
  Lee Seung Hoo Support Role

Guest Role

• 
  Ye Soo Jung

  Madame Jung [Sung Min's mother] (Ep. 1)

  Guest Role
• 
  Yang Hyun Min

  Oh Sung Min / "The Butcher" [Gangster] (Ep. 1, 4)

  Guest Role
• 
  Lee Ga Yeon

  Hong Min Ah [Hong Jung Ho's daughter / Past victim] (Ep. 5-6, 19)

  Guest Role
• 
  Kim Oh Bok

  [Police station security] (Ep. 6)

  Guest Role
• 
  Kim Jung Young

  [Joon Young's mother / Dong Chul's wife] (Ep. 7)

  Guest Role
• 
  Shin Soo Jung

  Medical examiner Lee (Ep. 9)

  Guest Role
• 
  Shin Yeon Suk

  [Hope Orphanage head nun] (Ep. 10)

  Guest Role
• 
  Seo Jang Hyun

  [Hope Orphanage boy] (Ep. 10)

  Guest Role
• 
  Cha Sung Je

  [Hope Orphanage boy] (Ep. 10)

  Guest Role
• 
  Seo Kwang Jae

  Lee Won Woo [President] (Ep. 13)

  Guest Role
• 
  Jang Gwang

  [Retired medical examiner] (Ep. 17-18)

  Guest Role
• 
  Kim Kang Hoon

  Jo Hyun Woo / Goo Do Kyung [Young]

  Guest Role
• 
  Yeo Woon

  Seong Min Jae (Ep. 25)

  Guest Role
• 
  Song Ji Hyuk

  [Reporter at Hana Daily News]

  Guest Role
• 
  Yeom Dong Hun

  Yang Joo Il (Ep. 20)

  Guest Role
• 
  Kim Geon U

  Kim Tae Pyung [Young]

  Guest Role
• 
  Joo Ye Rim

  Seo Joon Young [Young]

  Guest Role
• 
  Kim Hak Seon

  Seo Dong Chul [Joon Young's father]

  Guest Role
• 
  Choi Da In

  Lee Mi Jin [Jun Hee and Ji won's daughter]

  Guest Role
• 
  Kim Yong Jun

  Cho Pil Du [Condemned criminal]

  Guest Role
• 
  Lee Do Hyun

  Hong Jung Ho [7th victim's father]

  Guest Role
• 
  Kang Young Eun

  [Orphanage girl]

  Guest Role
• 
  Kwon Hyuk Sung

  [Detective]

  Guest Role
• 
  Choi Soo Hyun

  [Charnel employee]

  Guest Role
• 
  Park Jung Eon

  [Citizen]

  Guest Role
• 
  Lee Dong Gyu

  [News anchor]

  Guest Role
• 
  Kim Young Sun

  [Pil Doo's wife]

  Guest Role
• 
  Kang Jung Goo

  [Doctor]

  Guest Role
• 
  Jung Joon

  [Student]

  Guest Role
• 
  Kim I San

  [Reporter]

  Guest Role
• 
  Kwon Dong Won

  [Detective]

  Guest Role
• 
  Kim Woo Jin

  Police Constable Lee

  Guest Role
• 
  Kim Gun Soo

  [Paramedic]

  Guest Role
• 
  Hong Eun Jeong

  [Police officer]

  Guest Role
• 
  Roh Eun Jung

  [Leader]

  Guest Role
• 
  Lee Si Young Guest Role
• 
  Kim Ha Neul Guest Role
• 
  Kim Han Sang Guest Role
• 
  Kim Seong In Guest Role
• 
  Shin Soo Ho Guest Role
• 
  Lee Seung Jin Guest Role
• 
  Joo In Young

  [Hyeon U's mother]

  Guest Role
• 
  Lee Hye Jo

  [Nurse]

  Guest Role

Bit part

• 
  Gi Hwan Bit part

Unknown

• 
  Ha Yi An Unknown
• 
  Jin Shi Won Unknown
• 
  Ahn Chan Woong Unknown
• 
  Byeon Dong Wook Unknown
• 
  Lim Jae Min Unknown
• 
  Kim Byung Chul Unknown
• 
  Byun Yoon Jeong Unknown