A boss fight is a major battle against a stronger or more important enemy. It often appears at the end of a level, dungeon, chapter, or story section.
Why boss fights stand out
Bosses usually have more health, special attacks, phases, patterns, or mechanics than regular enemies. They are designed to test what the player has learned.
Good boss design
A strong boss fight gives players clear feedback. The player should be able to learn attacks, find openings, improve timing, and feel that victory came from better play.
Boss fights are common in Soulslike games, RPGs, action games, platformers, and PvE co-op games.