The deepest two-player games all share one trick: the players know different things. Poker is a bluffing game because your cards are yours alone. Charades exists because one head holds a word the other cannot see. FOGHORN does it with a chart and a boat: one of you studies the rocks for as long as you like, on a chart the boat is not drawn on, then hands the phone over. The fog closes. The other steers a boat you can both see through water neither of you can, and every rock now lives in one head and has to pass through a voice into the other\u2019s hands. \u201cReef on your left, hold right, NOW.\u201d That sentence is the whole game.
Why it exists
The together wing had six games and every one gives both players the same job: the same nine letters, the same pools, the same snap, the same tug. Symmetric games are fair by construction and shallow by construction, because neither player has anything the other needs. Asymmetric information is where the talking starts, and the talking is the actual game: FOGHORN's screen is deliberately less interesting than the conversation happening over it.
One phone, honestly
Both of you can see the screen, and the design leans into it instead of pretending otherwise. During the sail, the screen shows the boat and the fog and nothing else, so looking helps nobody. What the navigator has is memory, and what the sailor has is hands, and neither can do the other's job. The asymmetry is machine-checked before every release: the chart phase must never draw the boat, and the sailing phase must never draw a rock beyond the fog's reach, asserted against a log written inside the actual drawing code, never against intentions.
Three crossings, each a different sea
The first is a fair channel in patchy fog, for learning each other. The second closes the fog in tight, so the voice has to carry more. The third adds a running tide that pushes the boat sideways, drawn in the water so it reads as weather rather than a cheat. And the roles swap between crossings, stated in so many words on the handover screen, because the navigator who thought steering was easy deserves the wheel.
The corridor is carved before the rocks are laid
Every course starts as a wandering corridor three boat-widths wide from the setting-out to the harbour, and the rocks are only allowed to land outside it. A crossing can be failed, but never rigged: before release, a bot with perfect information has to make harbour on twenty generated courses in a row, so if you ran aground, the line existed and the two of you missed it together.
The line neither of you made alone
At the end of each crossing the chart comes back with everything on it, and the track you actually sailed is drawn over it in red. That line is a conversation made visible: every wobble is a hesitation, every clean curve is a sentence that arrived on time. It is the together wing's favourite kind of artefact, the one that needed both of you.
The quiet parts
No account, no server, no chat to moderate: the second player is sitting next to you, which is the whole point. The game runs entirely in the browser and works with the wifi off. Nothing about your voyages leaves the phone.