The section offers a summary for the evidence found in building C in Get Even and tips on how to access the flashback room and its contents.
The evidence for building C is shown on the screenshot above. Building C is characteristic for its large amount of collectibles - Cole makes two visits to the area, which are represented by two interactive screens in the bottom right corner of the screen. Pay attention to the map when exploring the area and make sure to visit all side rooms, are these often store secrets. Remember to scan all locations -interactive items will be marked with green dots.
In our case, the gate was unlocked by inputting 7830, but as the game randomizes this type of data, you may receive a different combination. Warning - Avoid inputting the combination without going through with the mission, as the gate will stay locked.
The secret room can be visited during your second visit to Block B. Start by interacting with the picture on the right side of the evidence room - you won't need to complete the first visit. You need to make your way to the door (shown on the screenshot above) which will allow you to leave the party room (by taking care of the dancer or by defeating the mannequins)
You'll enter a new set of server rooms. Proceed forward, but wait for a right turn to find a passageway located next to the generators.
Turn right and get past the posed mannequin to find a locked gate. You can interact with the lock to input the acquired code.
The hidden room contains a TV that replays a conversation between Ramsey and Black when interacted.