Navigating through the eerie corridors of Chapter 3 in Little Nightmares 2 presents players with some of the most unsettling challenges in the entire game. As Mono and Six venture deep into the dark, dilapidated Hospital, the atmospheric tension shifts from simple evasion to complex environmental logic. Surviving this twisted medical facility requires a mix of sharp observation, resource management, and precise movement to bypass the terrifying patients waiting in the shadows.

Securing the First Battery in the Ward

Your journey through the facility relies heavily on restoring power to locked elevator doors and secure gates. The first major puzzle requires players to explore the right wing of the ward to locate a hidden fuse battery. You must coordinate with Six to boost Mono through high transoms and open blocked pathways. Be careful to watch the movements of idle mechanical limbs strewn across the floor, as some will suddenly spring to life.

Once you navigate past the initial maze of moving parts, you will find the glowing power cell resting inside a small office. Transporting the heavy object back to the main hub requires throwing it over low barriers while staying alert to background noises. Inserting this unit into the circuit board opens up the adjacent hallway, granting access to deeper sections of the facility.

Surviving the Flashlight Mechanic and Mannequin Encounter

The core survival element within the lower wards introduces a terrifying mechanic that tests your spatial coordination under immense pressure. The twitching patients residing in these rooms are paralyzed by direct exposure to bright beams. You must learn to maneuver Mono while constantly aiming your flashlight toward oncoming threats to freeze them instantly. Relying on steady movements rather than panicked aiming is the key to preventing these fast-moving threats from overwhelming you.

Passing through the main ward corridor requires players to navigate through tight clusters of deactivated mannequins. You should pre-aim your beam down wide choke points to catch advancing enemies before they can close the distance. Maintaining a safe distance from dark alcoves ensures that you have enough room to execute a tactical retreat if a hidden hostile suddenly emerges from the darkness.

Solving the X-Ray Room Key Puzzle

Deep within the research sector, players encounter a locked gate that blocks further progress toward the elevator shafts. A nearby diagnostic room houses a functioning X-ray machine that holds the secret to locating the missing key. You must pull the power levers to activate the viewing screen and carefully inspect various stuffed toys collected from the surrounding rooms. Sliding each toy behind the radiation screen reveals which item contains a swallowed metal key hidden inside its stuffing.

After identifying the correct toy, you must carry it down to the incinerator room located in the lower basement level. Activating the furnace mechanism will burn away the soft fabric, leaving the valuable metal key completely exposed within the ash tray. This puzzle highlights the game's unique environmental storytelling, reward mechanics, and clever integration of everyday hospital equipment.

Escaping the Doctor and Final Power Grid Setup

The climax of the hospital chapter pits Mono and Six against the massive, ceiling-crawling Doctor in a tense game of stealth. You must use rolling hospital beds and low counter spaces to break the monster's line of sight while moving between rooms. Waiting for the creature to turn its back allows you to quietly pull the final heavy switches needed to activate the primary power grid. Precision timing ensures you can navigate the final corridor sprint and permanently trap the pursue inside the furnace chamber.