- Park Bo-gum
- Seo Bok
- Gong Yoo
- Ki Heon
- Jang Young-nam
- Dr. Im Se-Eun
- Jo Woo-jin
- Chief Ahn
- Arash Aiinehsazian
- Kim Walker
- Daniel Joey Albright
- Mercenary 3
- Leraldo Anzaldua
- Seobok
- Paul Battle
- Carl Anderson
- Sena Bryer
- Hak-Sun
- Park Byeong-eun
- Shin Hak Seon
- Jacob Eiseman
- Various Soldiers and Walla
- Lee Eon-jeong
- Yoon Hyeon-soo
- Andreas Fronk
- Mercenary
- Ron Guan
- Doctor Song and Walla
- Yang Hee-Woo
- Gas Station Attendant
- Lim Jae-Min
- Extraction room researcher
- Park Ji-hoon
- Mercenary leader
- Han Ji-Hyun
- Convenience store student
- Na Kwang-hoon
- Kim Walker
- Erin Nicole Lundquist
- Yoon Hyun-Soo / Clothing Store Owner / Nurse (voice)
- Jung Mi-nam
- Mercenary #12
- Shogo Miyakita
- Director Ahn
- Erica Muse
- Bureau Officer / Teen / Loop (voice)
- Kim Na Young
- [Convenience store student]
- Chris Okawa
- Roberts / Agent 2 (voice)
- Jin Shi-Won
- Seo In security agent
- Maurice Turner Jr.
- Foreign Mercenary
- Rebecca Jensen Uesugi
- Dr. Im Se-Eun
- Eric Yang
- Manager Huh
- Kim Yong-Joon
- Rear car dispute man
