Key items are essential for progressing through scenarios. These include various Keys (e.g., Bar Key, Gate Key, Locker Key), Keycards, Valve Handles, Fuses, and puzzle pieces. They are often found in specific locations and are required to unlock doors, activate machinery, or solve environmental puzzles. Unlike other items, key items usually cannot be dropped or combined. Pay close attention to your map and objective markers to locate necessary key items. Communication with teammates about who is carrying which key item is vital in multiplayer.
