The Chronicles of Riddick: Assault on Dark Athena

This achievement is completed during the Assault on Dark Athena campaign.

During part of the story, you will run across Miles who is in the process of being turned into a drone. Speak to him. He will ask you to find and send a message to his family and to kill him.

Once you've killed him, go ahead and ignore this achievement until you are in the sequence where you are in the mech. At the end of this segment, you will find yourself destroying 2 enemy mechs in the cellblock you've been forced to visit several times. After destroying the mechs, go to the door to the control room. Here you will be forced to get out of the mech. Before venturing into the nearby vent, go to the cell that contained the unconscious Johns (if looking back into the room, it is the first on the left). Inside here on the right hand side is the note just under the edge.

Go back to the aforementioned vent. After a cut scene and the fight with Jaylor, go back to the com station where you first picked up the Data pad. Careful on your way there because you will be attack by another of the freed prisoners.

Once you arrive, you will be forced to use the station once to progress the story. After the cut scene, use it again and your achievement should unlock.