Guest Stars Kwon Yoo-joon as Masked Front Man Stand-in Jeon Young Soo voices Game Guide Kim Byung Chul as Instructions Guard Kwak Ja Hyung as Player 278 Kim Dong Won as Player 303 Yoon Young Kyun as Player 040 Yoon Seung Hoon as Park Ju-un Yoon Don Sun as No Sang-hun Park Jong Beom as Guard 28 Stand-in Kim Yoon as Hwang Jun-ho Stand-in Hyun Jin as Player 209 Na Dae Heum as Deck Manager Lee Jung Joon as Revealed Guard Choi Jun Seok as Mask Scan Guard Park Geon Ryul as Toilet Guard
