Note: this run was rejected a time ago cuz of a misunderstanding (dont need to activate the portals for 100%). In the 100% route, do the ferryman quest at the end of the game to use the key in fk1 gate and this saves several time, is that allowed here?

Mod edit: Doing the Ferryman Quest later on is allowed in the Full Game 100% Speedrun because it is still done within the run. For a The Plains 100% IL, the Ferryman Quest must be completed. Otherwise, the run would end before reaching the highest % possible before transitioning to the Forgotten Keep (which indeed, is not 100% in The Plains because of the unobtainable treasure).

Time is 290,867. 5 Coin Chests were slashed --> +5 seconds. Ferryman Cutscene didn't play --> +2,90 seconds. Overall: 4:58.767