{"rewrite":{"id":"r_77e0b9545d01d238d363ee7a","clusterId":"c_4229b4accedf01ec451559d9","slug":"traffic-control-puzzle-if-red-then-stop-gets-steam-demo","model":"deepseek-v4-flash","headline":"Traffic Control Puzzle If Red Then Stop Gets Steam Demo","summary":"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.","whyItMatters":"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.","webCardHtml":"\u003cp\u003eThe 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.\u003c/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThe demo has six stages that teach state machines, then adds harder traffic conditions.\u003c/li\u003e\n  \u003cli\u003eSteam lists one player, PC, and nine supported languages including Japanese and English.\u003c/li\u003e\n  \u003cli\u003eKerzoven is six people: Marco Burri, Iris Wippich, Manuel Wirth, Wayne Hintermann, Raoul Zander, and Denise Hohl.\u003c/li\u003e\n  \u003cli\u003eThe idea came from founder and automation engineer Marco Burri, after a frustrating new traffic light system on his commute.\u003c/li\u003e\n  \u003cli\u003eMetaroot is a family-run micropublisher in Zurich. Its catalog includes Right Away! Goblin Sushi, River Towns, Airships: Lost Flotilla, and Breath of the Land.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003e\u0026#34;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,\u0026#34; the press release states.\u003c/p\u003e","blueskyPost":"If Red Then Stop is Metaroot's second programming game, and its demo drops while Farmer Was Replaced() has already moved about a million copies. Metaroot is betting a six-person Swiss studio can repeat that in traffic systems.","twitterPost":"If Red Then Stop is Metaroot's second programming game, after Farmer Was Replaced() sold about 1 million copies. The publisher is repeating a proven niche.","threadsPost":"If Red Then Stop carries Metaroot's programming-game playbook: the Zurich publisher shipped Farmer Was Replaced() to about 1 million copies, and now backs a six-person Swiss studio applying the same idea to traffic systems. The demo arrives with no release date or price set.","newsletterBlurb":"A programming puzzle about traffic infrastructure now has a playable demo. If Red Then Stop puts you in charge of lights and crossing barriers in a congested Swiss city, and publisher Metaroot is the company behind Farmer Was Replaced(). The demo is on Steam with six stages.","attributionJson":"[{\"source\":\"4Gamer.net\",\"url\":\"https://www.4gamer.net/games/041/G104136/20260910011/\",\"title\":\"Traffic Jam Prevention Puzzle \\\"If Red Then Stop,\\\" Where You Program Traffic Lights, Launches Demo; A Programming Game Born from a University Education App\"},{\"source\":\"Denfaminicogamer\",\"url\":\"https://news.denfaminicogamer.jp/news/260910e\",\"title\":\"Demo Released for 'If Red Then Stop,' a Game About Solving a Hopeless 'Traffic Infrastructure' Through 'Programming'; Build Traffic Systems From Scratch, Such as 'If the Light Is Red, Then Stop the Cars'\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":10982,"outputTokens":1223,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1789010970,"createdAt":"2026-09-10T03:26:17.000Z","publishedAt":"2026-09-10T03:28:22.000Z","updatedAt":"2026-09-10T03:28:22.000Z"},"cluster":{"id":"c_4229b4accedf01ec451559d9","canonicalTitle":"絶望的すぎる“交通インフラ”を「プログラミング」で解決するゲーム『If 赤 Then 停止』体験版が配信開始。「信号が赤なら→車を止める」など交通システムをゼロから構築","representativeArticleId":"a_52a1e4ea7d38a5ea38ef2d50","sourceCount":3,"writtenSourceCount":2,"writeAttempts":0,"isSolo":false,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"If 赤 Then 停止\"],\"studios\":[],\"people\":[],\"type\":\"release\",\"domain\":\"games\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-09-10T02:48:32.000Z","lastSeenAt":"2026-09-10T03:45:03.000Z","updatedAt":"2026-09-10T03:50:42.000Z"},"attribution":[{"source":"4Gamer.net","url":"https://www.4gamer.net/games/041/G104136/20260910011/","title":"信号機をプログラミングして街の渋滞を防ぐパズル「If 赤 Then 停止」，体験版が配信開始。大学向け教育アプリから生まれたプログラミングゲーム"},{"source":"Denfaminicogamer","url":"https://news.denfaminicogamer.jp/news/260910e","title":"絶望的すぎる“交通インフラ”を「プログラミング」で解決するゲーム『If 赤 Then 停止』体験版が配信開始。「信号が赤なら→車を止める」など交通システムをゼロから構築"},{"source":"Game Spark","url":"http://www.gamespark.jp/article/2026/09/10/172055.html","title":"街の流れを止めるな！プログラミングゲーム『If 赤 Then 停止』デモ版配信―エンジニアとして信号機や遮断機を制御。『農家は Replace() されました』パブリッシャー新作"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["If 赤 Then 停止"],"studios":[],"people":[],"type":"release","domain":"games","is_roundup":false},"keyFacts":["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."]}