Here ' s some more tidbits then ! It is unknown both to the readers and to the people inside Tower of God how many floors the Tower actually has , but as of now , 134 towers are cleared , and none have been able to pass the 135 th Guardian ' s challenge . As such , when people refer to the Top of the tower they are talking about the 135 th Floor . Khun saying that the top of the tower only has a roof is because he thinks Baam is talking about the top of the 135 th Floor this is a miscommunication between Baam and Khun , and hence Khun doesn ' t understand why Baam would think the 135 th floor would have a sky . In addition , a regular person climbing the tower becomes a Ranker after clearing the challenge of the 134 th Floor , having reached the top of the tower . When you finish the first season I ' ll give some more tidbits regarding this the things I have withheld might be considered spoilers at this point , so I won ' t mention them