Explain the entirety of what's happened so far or just the last few chapters?
If it's the latter, after finding out that Yong-Taek and Seongchan were previous 'players' - people that were actively participating in the game as opposed to following a script Yong-Taek also informs Bada that Seongchan has been playing the longest, therefore if anyone knew anything about Bada, it would be him. He also asks Bada to take his tape out because he can't take the strain of the game any longer, effectively erasing his memories and returning him to a NPC. This gives Bada the opportunity to replace Yong-Taek's tape with Seongchan's so he can question him about the origin of the game and all he knows about how Bada started playing (since his memory is screwed up). When he wakes up after doing so, the normal course of events is altered and Bada finds Seongchan seemingly at odds with Doha. End of chapter 52.
My guess is that Doha has something to do with how Bada entered the game and/or why Bada's memory is f*cked, and Doha doesn't want Bada to know.
thanks for the explanation(⌒▽⌒)
Okay I'm still a little bit confused about what's happening can somebody explain it to me please