two characters, Mono and Six, cooperative gameplay, holding hands, dark atmosphere, eerie environment, dilapidated buildings, vintage television sets, long hallway, flickering lights, raincoat, paper bag mask, stealth action, puzzle-solving, platforming, suspenseful music, ambient shadows, soft glow, side-scrolling perspective, detailed textures, grimy walls, rusty pipes, abandoned hospital, creepy mannequins, distorted reality, atmospheric lighting, 3/4 view, dynamic duo, teamwork, immersive experience, horror adventure game, Little Nightmares II theme.