The Callisto Protocol
46 Achievements
1,540
44-57h
PC
Xbox One
Xbox Series
The Commonality
Uncover the mystery of Kallipolis Details for this achievement will be revealed once unlocked
50
8.29%
How to unlock the The Commonality achievement in The Callisto Protocol - Definitive Guide
Maka91
TrueAchievements
TrueAchievements
This achievement is rewarded for visiting both secret rooms in the game.
You will be required to visit them if you are going for all of the bios collectibles.
They can be found as follows:
Duncan Cole: Secret Room 1 - 04:14
Chapter 6
Yannick Sage: Secret Room 2 - 20:55
You will be required to visit them if you are going for all of the bios collectibles.
They can be found as follows:
Chapter 3
Duncan Cole: Secret Room 1 - 04:14
Chapter 6
Yannick Sage: Secret Room 2 - 20:55
5 Comments
I can confirm that this is cross save/playthrough. I found Secret Room 2 in my first playthrough then on my second run on a new save the achievement popped when I found Secret Room 1.
By BigPoppaHoyle on 05 Dec 2022 22:13
This is not required for the all bios achievement. I didn't find either secret room and I checked my inventory and both logs were missing but I still unlocked it.
By lolykon on 07 Dec 2022 13:28
BabyishDuck
TrueAchievements
TrueAchievements
The mystery of Kallipolis is related to the two secret rooms that can be found during chapter 3: Aftermath and Chapter 6: Below.
Here are notes and screenshots showing where these rooms are located.
Chapter 3: Aftermath
From the Laundry B202 room where you just fought the enemy take the left stairs down. Run forward to the other side of the room. Open the door on the right side and crawl through the vent.
Once through the vent follow the path down. Once at the bottom turn left and go into the room with all the chairs to find the audio log on the main desk.
Chapter 6: Below
14:46 - A little while later you will fight some enemies with no legs. After this you will shimmy through a small gap in the wall and will see a red ladder in front of you.
Climb the ladder and go through the small gap in the wall in front of you. Follow the path whilst taking out the enemies. At the end of the path, you will come across a door.
Walk to the right of the door to find the entrance to the room. The collectible will be on the table at the back.
If having trouble feel free to use this video as a reference:
Hope this helped, thanks again.
Here are notes and screenshots showing where these rooms are located.
Chapter 3: Aftermath
From the Laundry B202 room where you just fought the enemy take the left stairs down. Run forward to the other side of the room. Open the door on the right side and crawl through the vent.
Once through the vent follow the path down. Once at the bottom turn left and go into the room with all the chairs to find the audio log on the main desk.
Chapter 6: Below
14:46 - A little while later you will fight some enemies with no legs. After this you will shimmy through a small gap in the wall and will see a red ladder in front of you.
Climb the ladder and go through the small gap in the wall in front of you. Follow the path whilst taking out the enemies. At the end of the path, you will come across a door.
Walk to the right of the door to find the entrance to the room. The collectible will be on the table at the back.
If having trouble feel free to use this video as a reference:
Hope this helped, thanks again.
2 Comments
Great guide, thank you! 
By Canezza on 01 Feb 2023 23:25
No worries
By BabyishDuck on 03 Feb 2023 05:30
BabyishDuck
TrueAchievements
TrueAchievements
The mystery of Kallipolis is related to the two secret rooms that can be found during chapter 3: Aftermath and Chapter 6: Below.
Here are notes and screenshots showing where these rooms are located.
Chapter 3: Aftermath
From the Laundry B202 room where you just fought the enemy take the left stairs down. Run forward to the other side of the room. Open the door on the right side and crawl through the vent.
Once through the vent follow the path down. Once at the bottom turn left and go into the room with all the chairs to find the audio log on the main desk.
Chapter 6: Below
14:46 - A little while later you will fight some enemies with no legs. After this you will shimmy through a small gap in the wall and will see a red ladder in front of you.
Climb the ladder and go through the small gap in the wall in front of you. Follow the path whilst taking out the enemies. At the end of the path, you will come across a door.
Walk to the right of the door to find the entrance to the room. The collectible will be on the table at the back.
If having trouble feel free to use this video as a reference:
Hope this helped, thanks again.
Here are notes and screenshots showing where these rooms are located.
Chapter 3: Aftermath
From the Laundry B202 room where you just fought the enemy take the left stairs down. Run forward to the other side of the room. Open the door on the right side and crawl through the vent.
Once through the vent follow the path down. Once at the bottom turn left and go into the room with all the chairs to find the audio log on the main desk.
Chapter 6: Below
14:46 - A little while later you will fight some enemies with no legs. After this you will shimmy through a small gap in the wall and will see a red ladder in front of you.
Climb the ladder and go through the small gap in the wall in front of you. Follow the path whilst taking out the enemies. At the end of the path, you will come across a door.
Walk to the right of the door to find the entrance to the room. The collectible will be on the table at the back.
If having trouble feel free to use this video as a reference:
Hope this helped, thanks again.
2 Comments
Great guide, thank you!
By Canezza on 01 Feb 2023 23:25
No worries
By BabyishDuck on 03 Feb 2023 05:30
DarthTigore
TrueTrophies
TrueTrophies
There are two secret room needed for this trophy. The first room is in Chapter 3: Aftermath. Go into the Workshop before entering Maintenance. The second is in Chapter 6: Below. Go through the crack in the left wall just before entering the room where you turn the power on.
SOHEIL133
TrueTrophies
TrueTrophies
Webb
In order to unlock this achievement, you need to find two secret rooms located in two completely different chapters.
The first secret room can be found on the left side of the Machine Room (in Chapter 3, 'Aftermath'). Before you go down, head into Workshop B415 and then take the duct on the right. Then, follow the corridor all the way to the end to get access to this secret room. The audio log is at the table at the end.
The second secret room can be found in Chapter 6, 'Below', when you’ve made it through the Power Tunnels and are in the Power Plant. After making your way through the bottom floor, you’ll come across a ladder to go up a level. Directly opposite that ladder (with the Power Reactor control room on your right) is a small hole in the wall with a TIE Fighter-esque symbol to its right. Go in the hole and follow the path all the way to the bottom until you come to two large doors like you encountered at the first secret room. You can bypass the doors to the right where there’s a hole in the wall. Go through it and to the end of the room to pick up the audio log. Once you have done that, you'll unlock this achievement.
If you follow our implant bio collectibles guide, both are mentioned in there too.
The first secret room can be found on the left side of the Machine Room (in Chapter 3, 'Aftermath'). Before you go down, head into Workshop B415 and then take the duct on the right. Then, follow the corridor all the way to the end to get access to this secret room. The audio log is at the table at the end.
The second secret room can be found in Chapter 6, 'Below', when you’ve made it through the Power Tunnels and are in the Power Plant. After making your way through the bottom floor, you’ll come across a ladder to go up a level. Directly opposite that ladder (with the Power Reactor control room on your right) is a small hole in the wall with a TIE Fighter-esque symbol to its right. Go in the hole and follow the path all the way to the bottom until you come to two large doors like you encountered at the first secret room. You can bypass the doors to the right where there’s a hole in the wall. Go through it and to the end of the room to pick up the audio log. Once you have done that, you'll unlock this achievement.
If you follow our implant bio collectibles guide, both are mentioned in there too.
Webb
In order to unlock this trophy, you need to find two secret rooms located in two completely different chapters.
The first secret room can be found on the left side of the Machine Room (in Chapter 3, 'Aftermath'). Before you go down, head into Workshop B415 and then take the duct on the right. Then, follow the corridor all the way to the end to get access to this secret room. The audio log is at the table at the end.
The second secret room can be found in Chapter 6, 'Below', when you’ve made it through the Power Tunnels and are in the Power Plant. After making your way through the bottom floor, you’ll come across a ladder to go up a level. Directly opposite that ladder (with the Power Reactor control room on your right) is a small hole in the wall with a TIE Fighter-esque symbol to its right. Go in the hole and follow the path all the way to the bottom until you come to two large doors like you encountered at the first secret room. You can bypass the doors to the right where there’s a hole in the wall. Go through it and to the end of the room to pick up the audio log. Once you have done that, you'll unlock this trophy.
If you follow our implant bio collectibles guide, both are mentioned in there too.
The first secret room can be found on the left side of the Machine Room (in Chapter 3, 'Aftermath'). Before you go down, head into Workshop B415 and then take the duct on the right. Then, follow the corridor all the way to the end to get access to this secret room. The audio log is at the table at the end.
The second secret room can be found in Chapter 6, 'Below', when you’ve made it through the Power Tunnels and are in the Power Plant. After making your way through the bottom floor, you’ll come across a ladder to go up a level. Directly opposite that ladder (with the Power Reactor control room on your right) is a small hole in the wall with a TIE Fighter-esque symbol to its right. Go in the hole and follow the path all the way to the bottom until you come to two large doors like you encountered at the first secret room. You can bypass the doors to the right where there’s a hole in the wall. Go through it and to the end of the room to pick up the audio log. Once you have done that, you'll unlock this trophy.
If you follow our implant bio collectibles guide, both are mentioned in there too.
Marcus7
stratege.ru
stratege.ru
This guide was translated automatically.
Find two secret rooms, this has nothing to do with audio recordings.
6 Comments
In the process of collecting audio recordings according to the guide, you will visit these rooms.
By AlverMOR on 04 Jan 2023 19:00
Video guide (en).
By Ximul on 17 Dec 2022 11:48
MeJIoBou
stratege.ru
stratege.ru
This guide was translated automatically.
During the first playthrough, I did not visit the first secret room, and the trophy with audio recordings was closed. On the second playthrough, it was enough to run into the secret room in Chapter 3 and the trophy fell out.
ObsiEez
PSNProfiles
PSNProfiles
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