Accessing The Hive requires navigating through a heavily guarded entrance, likely disguised as a sewer system or an abandoned subway station. You'll face a combination of advanced infected (Tyrants, Lickers, Hunters) and possibly some remaining UBCS forces guarding the perimeter. The environment will be dark and claustrophobic, making close-quarters combat frequent.
Look for environmental switches or keycards to open blast doors and activate elevators. The path will be winding, often leading through ventilation shafts or maintenance tunnels. Be prepared for jump scares and ambushes. The deeper you go, the more grotesque the infected become. You might encounter Drain Deimos or Brain Suckers in greater numbers. Maintain tight formation and use your character's abilities to clear paths and protect your team.