🛠️ Mafia: The Old Country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。
2026年10月
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10/10土🎉 イベントMafia Family Business #6 - Celebrating Mafia III's 10-year anniversary
To all friends of the Family, salutamu. Welcome to the latest installment of Mafia Family Business, a semi-regular spotlight on the Mafia community, the teams that work on the games, and the impressiv…
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10/2金🎉 イベントCozy Up with 2K: The Autumn Sale is Live on Steam! Save Big Through Oct 8.*
https://clan.fastly.steamstatic.com/images/4128336/66a2bcaddd03b0f7481eaf24a784f4e18d4652b7.jpgAs the leaves turn and the crisp autumn air settles in, that familiar feeling returns: the golden hour af…
2026年8月
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8/15土🎉 イベントMafia Franchise Sale
With the arrival of Mafia: The Omertà Collection and discounts* on the games in this iconic series, there's never been a better time to join the Family. Experience four distinct eras of organized crim…
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8/11火🎉 イベントCelebrating one year of Mafia: The Old Country
Mafiosi, a year has passed since we first journeyed to Sicily together in Mafia: The Old Country. We're thankful that all of your support has given us the opportunity to continue Enzo's story in the M…
2026年6月
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6/26金🎉 イベントTime to Play: The 2K Summer Sale is Officially Live on Steam
The 2K Summer Sale is officially live on Steam, and it’s the perfect excuse to find your next great escape. Summer is about having the time to truly immerse yourself, dive deep into a world, and remem…
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。