Agent A: A puzzle in disguise
30 Achievements
69,500 XP
Google Play
Radar Rebel
Broadcast warning message to Agent B Details for this achievement will be revealed once unlocked
2,500 XP
32.73%
How to unlock the Radar Rebel achievement in Agent A: A puzzle in disguise - Definitive Guide
Story Related
Once you have downloaded the message for The Extraction, you will then need to broadcast the message via the communications tower to Agent B. You'll need tape (found in Ruby's desk drawer) in order to fix the tower, allowing you to send the message. As soon as it has been broadcast, the trophy will unlock.
If you're having any trouble with the story related parts of the game, please see the Walkthrough Guide provided here: LINK for help/reference.