Tower of God is the first addition to the T.U.S. (Tals Uzer Story) universe created by SIU (Slave in Utero).
Synopsis from MF:
Fan trailer:What do you desire? Fortune? Glory? Power? Revenge? Or something that surpasses all others? What ever you desire, 'that is here'. Tower of God.
Join Twenty-Fifth Baam as he climbs each level of the Tower to find his beloved friend, Lahel. Facing from impossible missions to mind bending puzzles as he uses any means necessary to reach the top.
The story follows the main character Twenty-fifth Baam as he climbs the Tower in search of Lahel, the girl who befriend him while he lived in a dark cave but abandoned him to see the stars at the top of the tower. It is Siu's first professional work so the art is pretty average in the start. However, the art and the story quickly pick up in quality with the intensity in the story being mind blowing currently. I highly recommend this to everyone.
It is a webcomic so it is available from the authors website: