Coming soon to Steam

RUNGWORKS

A puzzle game about ladder logic, the wiring language that runs factory machines.

You're the new junior controls engineer at Harrow Valley Packaging. Every level is a work order: read it, wire the rungs, and run the program until your outputs match the machine on all three test runs. Then do it again with fewer parts.

See screenshots

33 levels 5 chapters Windows Steam friends leaderboards

Interview question 6 of 6 · Start / Stop SCAN 00/32

Press START and the motor seals itself in. STOP wins. MATCHES TARGET

Transfer Switch, the final trouble call. The grid dropped in an ice storm and the old relay logic is in a puddle on the floor.

How it plays

One work order at a time

No ladder logic experience needed. The first chapter is your job interview, and it teaches the basics one question at a time.

STEP 1

Read the work order

Someone at the plant needs a machine to behave. The dock door must reverse when the photo-eye is blocked. The sump pumps must take turns. Each order lists the inputs, outputs and memory you get.

STEP 2

Wire the rungs

Place contacts, coils, set and reset coils, timers and counters on the ladder grid. Power flows left to right, and rungs solve top to bottom, once per scan.

STEP 3

Match the trace, then beat it

Step scan by scan or run it live against the plant. When all three test runs match, you've solved it. Now try for fewer parts, or fewer rungs, and see how your Steam friends did.

Story

A year at Harrow Valley

From a windowless interview room to the 3 a.m. trouble call. The plant bottles soap, and most of it runs on relay logic from 1987 and zip ties.

Chapter 1

The Interview

6 levels

Six questions stand between you and a hard hat. Contacts, AND and OR, and the seal-in every motor starter uses.

Chapter 2

First Week

7 levels

Maintenance work orders from Marv. Hoists, doors, fans and anything he doesn't trust.

reversing hoist · rollup dock door · stairwell timer · star-delta starter

Chapter 3

Line 2

8 levels

Production equipment for Priya. Every fix is boxes out the door.

jam detect · bottle filler · case packer · conveyor train · baler · pick and place

Chapter 4

Plant Systems

6 levels

Projects with Theo from facilities. Everything that runs while everyone else is asleep.

duplex sump · crossing signal · alarm annunciator · truck wash · mix tank

Chapter 5

Trouble Calls

6 levels

The cursed panels. Floats that lie, contactors that weld, drives that won't stay reset. Your logic has to work anyway.

stuck float · welded contactor · VFD auto-reset · lead/lag lift station · transfer switch

Screenshots

From the shop floor

Select any screenshot to see it full size.

The Dock Door level running, with a door position trace above the input and output timing chart. — **Dock Door.** The door's position trace moves with your outputs.

The Duplex Sump level, with a six-rung alternator program and a tank level chart. — **Duplex Sump.** The tank level reacts to your pumps.

The Star-Delta Starter level, with a five-rung program using two on-delay timers. — **Star-Delta Starter.** STAR and DELTA must never be on together.

The Chapter 3 Line 2 story card over the Jam Detect level. — **Line 2.** Each chapter opens on someone who needs something running.

The solve screen for Start / Stop showing 4 parts and 1 rung. — **Solved.** Two scores per level, and a friends board on Steam.

The level select screen with chapters 1 and 2 solved. — **Level select.** Your best parts and rungs on every card.

The Truck Wash level running a sequencer program. — **Truck Wash.** A timed sequencer for the wash bay.

The Lead / Lag lift station level with a tank level chart. — **Lead / Lag.** Lift station alternation, with a lag pump for storms.

The Baler level with a ram position trace. — **Baler.** The ram moves as you drive it.

The people who send the work orders

Who's calling

From

Dana Okafor

Controls Lead Everybody's résumé says they know PLCs. So show me you can read a rung.

From

Marv Kowalczyk

Maintenance Supervisor New engineer gets the fun ones. Test everything twice. And don't break my hoist.

From

Priya Raman

Production Manager, Line 2 I don't need it pretty. I need it running.

From

Theo Brandt

Facilities First one's wet. The stormwater sump under the east dock has two pumps and one of them is worn out.

In the panel

Features

33 levels in 5 chapters with a story told through work orders.
Real instructions: contacts, coils, set/reset, on-delay timers, counters and reset.
Live plant models. Tanks fill and drain, doors travel between limits, the baler ram moves.
Scan-by-scan stepping with a timing chart of every tag against the target.
Two scores per level, parts and rungs, which often pull against each other.
Steam friends leaderboards on every level.
Free-play sandbox with switches, lamps, edge and compare contacts, TOF, RTO and CTD.
Programs as text. Copy and paste solutions to share or back them up.

Details

On the nameplate

Rungworks is in playtesting now. The Steam store page opens soon, and wishlisting starts then.

Genre	Puzzle, programming
Platform	Windows 10 / 11, 64-bit
Players	Single-player, with Steam friends leaderboards
Length	33 levels in 5 chapters, plus a sandbox
Language	English
Status	Coming soon to Steam

Coming soon to Steam

“Rule one: the field devices lie. Rule two: the logic has to work anyway. Rule three: label your wires.”