Temporal Research Centre
Walkway keycard
Goes in the keycard reader at the door between the walkway and the main hall, in the Present. The two keycard readers in the Time Maze take it too.
What it is for
Where the walkthrough uses it
5-1 The TRC· step 4both players
Take the keycard on the walkway (the Hook Gun can pull it to you) and put it in the machine by the main hall door.
Where to find it
No item spot is random: the game files place every item in the same spot in every game. Some items exist several times at once, such as the fuses in the Time Maze. From the game files: the area is loaded at these checkpoints. A door on the way can still be locked at some of them.
How to find it
In the office with the red carpet beside the wide red steps. It lies on the angled white desk, next to the orange office chair and the computer.
Checkpoints where its area is loaded
- 5-1 The TRC · both players
5 mSeen from above with the ceiling removed. Yellow ring: this spot. Small labels: other spots of the same item close by (select one to go to it). 
The spot seen from nearby (rendered from the game's own level geometry).
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