Use 'climactic' to describe the peak in stories or events, where tension and interest are at their max. The climactic battle in the book had everyone on the edge of their seats.
Pro Tip 2/3
Emotional Impact
'Climactic' often indicates a thrilling, emotional, or decisive moment that leaves a strong impression. Her climactic decision to travel the world alone surprised everyone.
Pro Tip 3/3
Not the End
The 'climactic' part is not necessarily the conclusion but the point of greatest intensity before the end. Even after the climactic reveal, the film had a twist ending.