These items are essential for navigation, puzzle-solving, and basic survival. They are often non-consumable or have a specific resource associated with them.

- Flashlight: Your most important tool. Provides light in dark areas. Requires Flashlight Batteries to operate. Always keep it charged.
- Flashlight Batteries: Consumable items that replenish your flashlight's power. Found sparingly throughout the environment.
- Lighter: A secondary, weaker light source. Useful for conserving flashlight batteries or when the flashlight is out of power. Has infinite use but a very limited range.
- Map: Found early in the game, the map helps you navigate the complex facility. It often updates as you discover new areas.
- Keycards/Keys: Specific items used to unlock doors or access restricted areas. Often tied to specific puzzles.
- Wrench: A tool used for repairing machinery or opening bolted panels.
Always ensure your flashlight has sufficient power before venturing into new, dark areas. The map is invaluable for understanding your current location and planning your next move.