An innovative voice-controlled adventure game, played through a series of interactive 'phone calls'. Join the heist and save the world... using nothing but your voice. Will you answer the call? *WARNING: THIS GAME CONTAINS FLASHING LIGHTS*
We are not affiliated with IsThereAnyDeal.















*NB this game requires a good plug-in mic (laptop mics work ok... but can be a little flaky with noisy fans!)* Unknown Number tells the story of a high-stakes heist, and is experienced entirely through a series of interactive “phone calls”. This adventure will have you cracking passwords, tricking guards, impersonating oil executives - and just generally saving the whole goddamn world - all with your voice.
Talk, Sing, Whisper, and Shout your way through this immersive puzzle-adventure that uses voice commands for just about everything. Use your voice to...
Unknown Number starts with a mysterious voicemail from two panicked eco-warriors on an abandoned oil rig. They’re trying to steal $7 billion from the world’s most notorious oil baron, to use in the fight against climate change. But something’s gone terribly wrong – and that’s where you come in.
As the narrative unfolds, you’ll be using voice-commands to talk directly to a rich cast of complex characters - and to solve a wide variety of puzzles. Expect moral quagmires and head-scratching aplenty. Who knows, you might even make it out alive… Will you answer the call?
Steam data © 2025 Valve Corporation. Steam and the Steam logo are trademarks and/or registered trademarks of Valve Corporation in the U.S. and/or other countries. Independent of Valve. Pricing and availability subject to change.















*NB this game requires a good plug-in mic (laptop mics work ok... but can be a little flaky with noisy fans!)* Unknown Number tells the story of a high-stakes heist, and is experienced entirely through a series of interactive “phone calls”. This adventure will have you cracking passwords, tricking guards, impersonating oil executives - and just generally saving the whole goddamn world - all with your voice.
Talk, Sing, Whisper, and Shout your way through this immersive puzzle-adventure that uses voice commands for just about everything. Use your voice to...
Unknown Number starts with a mysterious voicemail from two panicked eco-warriors on an abandoned oil rig. They’re trying to steal $7 billion from the world’s most notorious oil baron, to use in the fight against climate change. But something’s gone terribly wrong – and that’s where you come in.
As the narrative unfolds, you’ll be using voice-commands to talk directly to a rich cast of complex characters - and to solve a wide variety of puzzles. Expect moral quagmires and head-scratching aplenty. Who knows, you might even make it out alive… Will you answer the call?
An innovative voice-controlled adventure game, played through a series of interactive 'phone calls'. Join the heist and save the world... using nothing but your voice. Will you answer the call? *WARNING: THIS GAME CONTAINS FLASHING LIGHTS*
We are not affiliated with IsThereAnyDeal.
Steam data © 2025 Valve Corporation. Steam and the Steam logo are trademarks and/or registered trademarks of Valve Corporation in the U.S. and/or other countries. Independent of Valve. Pricing and availability subject to change.