Key items are crucial for progressing through the main story. These items are typically unique, cannot be dropped, and are automatically used when you interact with the correct environmental element. While their specific names vary by episode, their function remains consistent: unlocking new areas, activating machinery, or solving puzzles.
- Keys/Keycards: Used to open locked doors, gates, or access restricted areas. Often found on enemy bodies, in offices, or hidden in containers.
- Gears/Cogs: Mechanical parts required to repair broken machinery, such as lifts, bridges, or power generators. Typically found in workshops or storage rooms.
- Fuses/Circuit Breakers: Electrical components needed to restore power to systems, lights, or electronic doors. Often located in utility rooms or control panels.
- Documents/Notes: While not always 'key items' in the traditional sense, many documents provide crucial information for puzzles, such as codes, sequences, or hints for environmental interactions. Always read any notes you find.
- Special Tools: Items like Moira's crowbar or Natalia's ability to crawl through small spaces act as 'key items' for specific environmental interactions, allowing access to new areas.
If you find yourself stuck, always retrace your steps and look for any interactive elements you might have missed. Your partner's abilities (Moira's flashlight, Natalia's sensing) are often essential for revealing hidden key items or interaction points. The game is designed to guide you towards these items, but thorough exploration is always recommended.