underwater, submarine, crew members, multiplayer, deep-sea exploration, pressure suits, dark ocean, bioluminescent creatures, mechanical tools, teamwork, emergency situations, sonar equipment, metal textures, rust, claustrophobic interior, leaking pipes, flickering lights, survival, tense atmosphere, high-stakes, aquatic monsters, resource management, 3/4 view, dim ambient lighting, detailed cockpit, complex machinery, murky water, intense action, co-op gameplay, interactive environment, procedural generation, immersive experience.