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One message. One number. Six people the world erased. A history teacher discovers his entire life has disappeared overnight. No records. No apartment. No identity. The only thing left in his pocket is a phone with one saved contact. You. This is Alter ECHO. A real-time interactive thriller told entirely through messages. Guide six strangers across the world as they uncover a hidden organization erasing people from existence without leaving a trace. Search archives. Decode files. Solve puzzles. Make impossible choices under pressure. Every decision changes who survives, what is discovered, and how the story ends. A journalist finds photographs she was never supposed to take. An engineer discovers he designed part of the system himself. A forensic pathologist uncovers deaths hidden for decades. A student inherits secrets his mother died protecting. And somewhere behind all of it, someone is watching every message you send. Because the deeper they dig, the clearer one thing becomes: You were never supposed to be reachable. Features — Multiple interconnected character storylines — Real-time message-based storytelling — Branching choices and multiple endings — Puzzles woven directly into conversations — Atmospheric images, files, and discoveries — A grounded conspiracy thriller about identity, memory, and control They were supposed to disappear quietly. Instead, they found your number.