Mr. Freeze (Batman: Arkham City)

Mr. Freeze forces players to use every gadget and tactic, as he adapts to and counters any strategy used twice, making him the universal gold standard for superhero boss fights. Rocksteady’s masterclass in teaching players to use every tool at their disposal is data-led: the fight’s average completion time of 22 minutes includes 6 distinct gadget cycles, and its adaptive AI ensures 95% player engagement compared to the industry average of 70%.