Crisis Core: Final Fantasy 7 Reunion follows a young SOLDIER named Zack on his quest to reunite his friends, get a promotion, and become a hero. He meets a variety of interesting characters throughout his journey, some of whom ask Zack for his help. While Zack doesn't need to assist these NPCs, he will usually receive some nifty items if he does.
During Zack's visit to Nibelheim, he can encounter a young, inquisitive boy standing beside the water tower. Upon interacting with him, the boy will ask Zack to investigate the Seven Wonders of Nibelheim, one of which requires him to unlock a safe in Shinra Mansion. Opening the so-called "laughing" safe can be quite difficult, but Crisis Core: Final Fantasy 7 Reunion does provide a few clues on how to do it.
Finding The Laughing Safe
Zack will need to solve three separate Wonders before the boy asks him to investigate the Shinra Mansion to the left in the Nibelheim - Outskirts. Once inside, he can then ascend the stairs, turn left, and enter the first door on the right to find the laughing safe, the supposed Fourth Wonder of Nibelheim. Attempting to open the safe will fail initially, as the player will not know the correct combination.
Thankfully, the note on the floor beside the safe will provide a decent clue as to what the combination could be. It's a little vague, but it does make sense once the player figures out what it's trying to say. The combination changes depending on the playthrough, so players will need to figure out the digits themselves.
The First Laughing Safe Digit
To uncover the first digit of the combination, Zack must peek through the keyhole on the eastern door on the second floor. On the other side, he will see an empty room with a bookcase leaning against the back wall. According to the piece of paper beside the safe, the first digit has something to do with "Knowledge overflowing," which in this case refers to books laying outside the bookcase.
The first digit in the combination can be deduced by counting the overflowing books in the room. For the correct number to be learned, players must count the books on the floor, the books on top of the bookcase, and the books lying on top of the chair in the right corner of the room. Once the first digit has been discovered, the player should make a note of it before moving on to the next door.
The Second Laughing Safe Digit
The second digit needed to open the laughing safe can be found by peering through the eastern door on the first floor. While looking through, players will see a collection of monsters swaying from side to side. Counting these monsters will reveal what the second safe digit is, but it can be quite tricky to see some of them.
While most of the monsters are clearly visible, some can be found hiding in the far corners of the room. These creatures can hide beyond the player's line of sight, but they will drift back into the frame after a moment or two. Once each monster has been counted, the player will learn the second digit.
The Third Laughing Safe Digit
Leaving the safe room and turning right will lead Zack to the next door. Peering behind it, he will be faced with a dilapidated bedroom full of strange and unusual objects. To learn the third digit required to open the safe, the player must count the Banora Apples spread throughout the room.
Not only must the player take note of the Banora Apples, but they should also count the yellow cans, as they also contain Banora Apples. Spotting the cans is easy thanks to their vibrant color, but finding the Banora Apples can be quite challenging. There may sometimes be two Banora Apples resting on the locker beside the bed; one is clearly visible, while the other is partially hidden behind a perfume bottle. As for the cans, the most difficult one to find will sometimes be positioned to the far right of the screen. It can be hard to see due to the room's lighting, but it must be counted to learn the third digit.
The Fourth Laughing Safe Digit
The fourth and final laughing safe digit can be found by looking through the keyhole of the western door on the first floor. On the other side, players will be greeted by a random number of chairs, each of which must be counted in order for the fourth digit to be learned.
Unlike the other rooms, the chair room is arguably the most well-lit, which makes it much easier for the player to count all the chairs behind the door. Though only portions of some chairs are visible, they are difficult not to notice thanks to the room's layout and lighting.
Opening The Laughing Safe
Once each digit has been discovered, Zack can return to the room with the laughing safe and enter the combination. Doing so will allow him to open the safe, revealing the source of the laughter. It turns out a Cactuar has been locked inside the safe all this time. After the prickly creature scurries away, Zack will find a Vital Slash Materia located at the base of the safe.
Before moving on to the next area, players should report their findings to the boy beside the water tower, where Zack will learn of the Fifth Wonder of Nibelheim. To investigate this Wonder, players must continue with the story until Sephiroth unlocks the passage leading to the secret lab below the Shinra Mansion. The remaining Two Wonders of Nibelheim can then be experienced by interacting with the boy during Sephiroth's attack.
Crisis Core: Final Fantasy 7 Reunion is now available on PS4, PS5, Xbox One, Xbox Series X/S, Switch, and PC.