
Green Mist over Portland
A detective noir puzzle deduction game. Explore a non-linear timeline during the cold war on a globe-trotting adventure following a trail of spies from a quiet English harbour town to a frozen Finnish fishing village and the corridors of an intelligence service rotten at its core.
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About Green Mist over Portland
Delphine and Cynthia return in a Cold War Mystery
Investigate what happened to your friend Arthur Birdwhistle, a highly decorated MI6 officer who has vanished without a trace. He was last heard from in a phone box in West Berlin. The morning after the president died. The call was cut short.
Green Mist over Portland is a standalone sequel to The Red Pearls of Borneo. You can play it on its own, but the first case is free on Steam if you want to meet Delphine first.
Play as two women on opposite sides of the same investigation: Delphine, the clairvoyant who can step into the past and witness events as they happened and Cynthia, the MI5 field agent who must interrogate suspects and discover clues deep within the MI6 secret archives.
The investigation will take you on a globe-trotting adventure following a trail of spies from a quiet English harbour town to a frozen Finnish fishing village and the corridors of an intelligence service rotten at its core.
Inspired by Return of the Obra Dinn, The Case of the Golden Idol and The Roottrees Are Dead
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Green Mist over Portland — frequently asked questions
When does Green Mist over Portland release?
Steam lists the Green Mist over Portland release date as Q4 2026.
How much will Green Mist over Portland cost?
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System requirements
Minimum
- OS: Windows 10 or Windows 11
- Processor: 2.0 GHz Dual Core Processor or better
- Memory: 4 GB RAM
- Graphics: Integrated Graphics (Intel HD 4000 or equivalent)
- DirectX: Version 11
- Storage: 500 MB available space













