The Callisto Protocol: How to Unlock the Commonality Achievement - Gameranx

Duncan Cole is the result of a years-long project to make the most conspiratorial human on record. From the moment he shows up in The Callisto Protocol, he’s obviously up to something, but the game’s a little cagey about exactly what. There are a couple of secret rooms found over the course of the game …

The Commonality Trophy Unlock Condition: How to Uncover the Mystery of Kallipolis

The Callisto Protocol - All Secret Room Locations (Commonality Achievement Guide) - IGN

The Commonality Trophy Unlock Condition: How to Uncover the Mystery of Kallipolis

The Callisto Protocol: How to Get All Implant Bios in Chapter 3 - Gameranx

The Callisto Protocol's Trophy List Goes Live - Gameranx

The Callisto Protocol: How to Uncover the Mystery of Kallipolis (Commonality Trophy/Achievement)

The Callisto Protocol: How to Get the Implant Bios in Chapter 6 - Gameranx

The Callisto Protocol: How to Get All Implant Bios in Chapter 3 - Gameranx

The Callisto Protocol - The Commonality 🏆 Trophy / Achievement Guide (Chapter 3 & 6)

The Callisto Protocol: How to Unlock the Commonality Achievement - Gameranx

The Commonality achievement in The Callisto Protocol

The Callisto Protocol - All Secret Room Locations (Commonality Achievement Guide) - IGN

The Callisto Protocol - Both Secret Room Locations (The Commonality Achievement/Trophy)