🛠️ The Letterのアップデート履歴
開発元がSteamで公開した公式告知（パッチ、新コンテンツ、イベント）を時系列でまとめています。タイトルをクリックすると全文を読めます。
2025年9月
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9/30火🎉 イベントFall Into Savings This Steam Autumn Sale!🍁
As nature sheds its summer coat, we're shedding our prices: get indie games published by Neon Doctrine for up to 90% OFF! If it's starting to feel chilly outside, why not stay indoors and cozy up with…
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9/7日🎉 イベントThe Letter Is A Part of Hungry Ghost Festival on Steam!👻
The veil grows thin, and the ghosts hunger for offerings!👻🕯️ Feed their eternal appetites at the Hungry Ghost Festival by SEA Games Aesthetic with a selection of hauntingly beautiful indie games publi…
2025年7月
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7/2水🎉 イベントThe Letter Joins Neon Doctrine with 70% OFF for the Summer Sale!☀️
Hello! Neon Doctrine here~ We're thrilled to announce that The Letter - Horror Visual Novel has joined our Neon Doctrine collection of indie games! What better way to celebrate than getting the game f…
出典：Steam公式告知（6～24時間ごとに更新）。タイトルと概要の著作権は各開発元に帰属します。