🛠️ Left 4 Dead 2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7月
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7/1水🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Revised fix for Linux build including latest security patches.
2026年6月
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6/27土🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed several crashes and exploits reported via HackerOne.
2025年2月
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2/6木🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed a compatibility issue that was causing a crash on Linux clients.
2025年1月
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1/18土🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed exploits used to crash remote servers.
2024年12月
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12/3火🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed some exploits used to crash remote servers.
2024年11月
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11/15金🎉 イベントLeft 4 Dead 2 Free Weekend
Left 4 Dead 2 celebrates its 15th anniversary this weekend by going free-to-play until November 18th. Jump in for the first time to battle zombie hordes with your friends, or come back for the opportu…
2024年10月
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10/25金🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Fixed several crash and remote code execution exploits. - Fixed a crash on some NVIDIA graphics cards when shader detail is set to High.
2024年7月
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7/27土🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2. - Player connect message is no longer networked to clients, to prevent exposing player IP addresses.
2024年6月
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6/27木🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed a regression that blocked taking screenshots.
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6/26水🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed a memory leak exploit in lobby chat. - Prevent running arbitrary script code on a remote server. - Prevent a network exploit that gave the client…
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6/5水🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed an exploit that could block a player from connecting to any game, whether online or local. - Fixed two exploits that used invalid content to cras…
2024年5月
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5/27月🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed a bug that prevented the community server list from appearing.
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5/15水🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed two exploits that could remotely crash servers. - Fixed music not playing at the main menu on Linux.
2024年4月
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4/23火🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Fixed another exploit where malicious network packets could severely degrade server performance. - Fixed a client exploit that could cause long server …
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4/13土🛠️ パッチ / アップデートLeft 4 Dead 2 - Update
An update has been released for Left 4 Dead 2: - Blocked an exploit that could forcibly disconnect a player from any server, even when playing a local game.
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。