Most players expect a Riddler Trophy for this. They are wrong. The broadcast does not lead to a green, question-mark-encrusted box. Instead, it unlocks a hidden audio tape that is critical to understanding Hugo Strange’s backstory.
While the "2-7-5 3-2-5" signal is directly tied to the Riddler, Batman: Arkham City contains a much deeper layer of secret broadcasts. These are that have no impact on gameplay but add immense depth to the story. By using the Cryptographic Sequencer at specific X, Y coordinates, you can intercept three distinct number stations. batman arkham city decode broadcast 2-7-5 3-2-5
Here is the decoded text for the broadcast found in Batman: Arkham City . Most players expect a Riddler Trophy for this
The side mission becomes active early in the main storyline after completing initial objectives inside the Solomon Wayne Courthouse. Instead, it unlocks a hidden audio tape that
To rescue all the hostages and confront the Riddler face-to-face, you must scan and collect a minimum number of scattered across Arkham City. Each milestone forces Oracle to decipher the next radio frequency. Required Trophies/Challenges Location in Arkham City Core Gadget Required #1: Eddie Burlow 0 (Story Triggered) Solomon Wayne Courthouse None (Combat Only) #2: Officer Leary 80 Trophies Industrial District (Exotic Chemical Lab) Batarang / Explosive Gel #3: Dr. Adam Hamasaki 160 Trophies Bowery (Catering Factory) Remote Electrical Charge (REC) #4: Officer Anne Bishop 240 Trophies Amusement Mile (Water Grid) Line Launcher / Freeze Blast #5: Guard Aaron Cash 320 Trophies Industrial District (Storage Warehouse) Remote Control Batarang Final: The Riddler 400 Trophies Hidden Hideout (Near the Museum) Disruptor / Absolute Stealth