"Cut the rope" is a mission objective in Sequence 9 / Memory 03: The Escape
Walkthrough[edit]
The hot air balloon is now caught on the steeple of a nearby church. Head to the South to hop onto the rope leading over to the church. Climb up to the top of the church and interact with the rope. Arno will cut it loose. Be mindful as a cutscene will run after Arno slices through the rope.