Traffic Control Puzzle If Red Then Stop Gets Steam Demo
Metaroot is repeating the Farmer Was Replaced() playbook: take a working prototype built for teaching, hand it to a small studio, and sell the programming loop as a puzzle game.
Key Facts
- Kerzoven released the demo for If Red Then Stop on Steam on September 10, 2026.
- The demo teaches state machines across six levels before moving to harder traffic conditions.
- Publisher Metaroot previously handled Farmer Was Replaced(), which sold about 1 million copies.
- If Red Then Stop was announced in October 2025 and its release date and price are undecided.
- Kerzoven is a six-person studio in Switzerland, and its first title Breath of the Land was released in 2025.
Reporting from 3 sources: 4Gamer.net, Denfaminicogamer, Game Spark.
Kerzoven, a six-person studio in Switzerland, released a demo for the traffic control programming puzzle If Red Then Stop on Steam on September 10, 2026. Players program traffic lights and railroad crossings with state machines, building rules such as stopping cars when a light is red or lowering a crossing barrier when a train approaches. The demo teaches the basics across six stages and then adds harder traffic conditions. Publisher Metaroot, based in Zurich, handled Farmer Was Replaced(), a programming game that sold about 1 million copies, and proposed turning Kerzoven's educational prototype into a commercial title. The game was announced in October 2025, and the demo launch is tied to the Steam Programming Fest. Kerzoven's first title, Breath of the Land, was released in 2025. The release date and price for If Red Then Stop are undecided.
The game is set in a Swiss city where the traffic equipment does not work and the roads stay congested. Players are a new engineer handed that system, and the work is programming traffic lights and crossing barriers so cars and pedestrians move and the barrier lowers for trains. Bad settings cause jams, citizens complain, and the player revises the code.
- The demo has six stages that teach state machines, then adds harder traffic conditions.
- Steam lists one player, PC, and nine supported languages including Japanese and English.
- Kerzoven is six people: Marco Burri, Iris Wippich, Manuel Wirth, Wayne Hintermann, Raoul Zander, and Denise Hohl.
- The idea came from founder and automation engineer Marco Burri, after a frustrating new traffic light system on his commute.
- Metaroot is a family-run micropublisher in Zurich. Its catalog includes Right Away! Goblin Sushi, River Towns, Airships: Lost Flotilla, and Breath of the Land.
"Starting from the basics of state machines, you can practically acquire programming knowledge and problem-solving skills by controlling traffic infrastructure while responding to increasingly complex traffic situations," the press release states.
Synthesized by Yomimono from the 3 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.