This series was an okay one. The type of series you'd want to binge rather than drag watching because every scene was immersive. I really enjoyed watching it and at the same time, I'm so nervous every time they would start playing the next game which we'd have to guess what. The production was huge and well-prepared. The characters, aka those staff of the game, were really unique looking with their masks and outfit. The acting was also effective; I really hated some characters and sympathize with some. I just don't know what's lacking in this series for me to say that it was quite enjoyable but not a favourite. Overall a good watch though. If you're looking for a thriller k-series and wouldn't be bothered with brutality, then this one might be for you.