Face 12 bosses consecutively to achieve the fastest time. Damage carries over between rounds, but missiles are replenished.
Defeat as many bosses as possible within a 5-minute time limit. Each victory adds extra time to the clock. Metroid Dread Switch NSP/XCI Update 2.1.0
Ensure your system or emulator is running a compatible firmware version (typically 14.0.0 or higher) to support the 2.1.0 update. Face 12 bosses consecutively to achieve the fastest time