You build the brains of elevators.
An open-ended engineering puzzle game set in a megacity that grew up, not out. Wire the control boards. Write the dispatch code. Move a whole building's day through forty years of a quietly unfolding story — at a desk you inherited from someone you'll never meet.
A contract arrives in your inbox: a building, a bank of elevators, and a whole day of people who want to be somewhere else. You place the chips, route the wires, and write the code that decides which car comes when — then watch the day run, and make it kinder.
— it's SHENZHEN I/O, but the circuits you build are the dispatch logic of a living city.
Four histograms, plotted against every other player and your friends. None of them is the answer. You pick which to chase — and a friend's score is what unlocks the solution you couldn't imagine yet.
Mastery has two halves. The spatial one is the board: place a global dispatch controller, one motion controller per car, and the sensors, lamps and logic between them — then wire it all with two interconnects that refuse to talk to each other.
Signal lines carry continuous levels — a lit hall lamp, a load cell, a direction arrow. The M-Bus carries packets — it is literally how the dispatcher talks to its cars. Confuse the two and nobody moves.
An elevator doesn't need a fast brain. It needs a tiny one with nerve. RCL is the assembly the whole career is written in — a handful of opcodes, a couple of registers, conditional +/− prefixes, and a slp that sleeps the chip so it draws no power.
The same language spans both roles — the dispatcher choosing cars, and each car driving steel — and the joy is in trading hardware against software until the day runs clean. Press RUN, and the building's whole day replays in seconds.
Passing a contract is the start. Then — entirely voluntarily — you go back and make the average wait shorter, because the number that drops is how long a stranger stood waiting. No other puzzle game asks you to be kind, efficiently.
▢ Each solution is judged across several fixed seeds — it must generalise as a policy, not a memorised trick.
The career runs 1972 → 2011. Every contract you ship turns the calendar, and the calendar is the only thing that hands you new chips, new instructions, and Dot's next dated note. Relay logic to networked dispatch to speculative ropeless shafts — with the firm and the city ageing around you.
Hopeful, hands-on, warm. Single and duplex cars; nine lines of code. You take Dot's old desk and find the terminal still logged in as her. The work is small, correct, and human-scale — and her margin notes teach you the craft from beyond the desk, never knowing you'd read them.
Ambitious, then anxious. Group control begins — multiple cars coordinated over the M-Bus. Haldane booms, the towers grow, the work gets genuinely hard. And Vertrans arrives: first a headline, then an oily email, then a contract your firm loses on-screen. Dot's notes get sharper, funnier, occasionally sad.
The squeeze — and the mystery opens. Full networked dispatch, destination control, true peak-load optimisation. A folder you couldn't open finally cracks: a building specification for a 64-floor tower with no address, no client, no contract number. Simulation logs Dot ran alone, at night, for years.
Elegiac, then tender. Supertall arcologies, sky-lobbies, speculative ropeless multi-car shafts, and the flagship RC-6400. The city has gone above the weather; the firm is a relic that builds beautiful relics. You assemble the last fragments of The 64th Floor — and finally understand what it is.
In our timeline, the twentieth century spent its genius on computation. In Haldane's, it spent that genius on going up.
Hemmed by mountains on three sides and tidal marsh on the fourth, Haldane could never spread. When its population began to climb in the 1890s, the city had exactly one direction left to grow — and a piece of luck that let it grow that way decades before anyone else.
The result is a civilisation whose defining technology is the elevator, whose scarcest resource is vertical throughput, and whose most essential engineers — the people who write the brains of elevators — are almost entirely invisible. You are one of them. Nobody in Haldane knows your name. Nobody thinks about the elevator until it's slow. You are the reason it almost never is.
A redundant overspeed governor and a wedge-and-rail safety brake that made tall-shaft lifts trustworthy a full generation early.
With falling cars no longer a death sentence, height stopped being a stunt and became real estate. The elevator, not the steel frame, is the hero of this skyline.
She held this desk and this exact terminal from 1971 to 2003. The best engineer the firm ever had, and the warmest — and she is gone before the title screen. You never meet her. You never hear her voice or see her face.
You come to love her the way you come to love any great predecessor: through the quality and character of the work she left behind, and through thousands of margin notes written for no one, in a hand you'll know by the end of Act I. A mentor you could talk to would answer your questions. A mentor made of artifacts makes you read her — and reading is an act of love.
Inside: a complete spec for a 64-floor tower with no address. Every floor named. A building with no ground — because it was never meant to touch the ground.
She built a dispatch controller for it, so that in simulation she could watch the impossible building fill and empty for one ordinary day. The game never says the quiet part out loud. You assemble it, and land the last inch yourself.
A dense, datasheet-styled manual you can actually print and bind — pinouts, opcodes, and Dot's handwritten margins, unlocking era by era.
The in-world newspaper. It advances time, prints worldbuilding, and quietly editorialises on the events your contracts caused.
A complete original looping-elevator solitaire, always sitting on the desktop for when a contract has beaten you and you need to think.
Export the building's whole day as a replay or GIF — little people boarding and arriving, your dispatch made visible and shareable.
No cutscenes, no dialogue trees. Every contract and every twist is an email. You reply by shipping a board that works.
Paper, amber, green, slate — the Meridian 64's monitor settings. Diegetic, not cosmetic. Dot always ran it green. (Try the switch up top.)
MERIDIAN 64 · 65535 BYTES FREE · RISE/64 v6.4 · READY
The city is waiting on the brains you haven't built yet. Be the reason the elevator almost never is slow.
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