Half-Life 2: Update
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Supported OS: 
Windows • 
macOS • 
Linux + 
SteamOS
Steam Deck status: 
Playable - 
More info on ProtonDB
Half-Life 2 to be purchased. Installation of Half-Life 2 is not necessary to play this standalone game.
About Half-Life 2: Update
Half-Life 2: Update is a mod released in 2015 that improves Half-Life 2 by fixing bugs and improving the graphics.
When Half-Life 2 transitioned from 
Source 2006 to 
Source 2009 in 2010, there was some occasional bugs and issues, which was listed here. Half-Life 2: Update tries to fix most of them while also improving the graphics, increasing draw distance, adding new effects without changing the core gameplay (aside from maps, which was slightly modified to add more Lambda Locator creates and symbols while keeping total as 45). Unlike the original (vanilla) Half-Life 2, this mod is completely standalone and have it's own separate saves, separate achievements, separate AppID and configs.
Bugs and Limitations
Warning:As of 2023, Half-Life 2: Update runs on the outdated version of 
Source 2013 from 2015, and it is no longer receiving updates, including recent bugs fixes exclusive to the vanilla Half-Life 2 introduced with the Steam Deck updates, which fixes bugs related to Dropship gun no longer rotates, load/save stuttering issues, etc... Without these bug fixes, the game will be noticeably easier such as when it comes to Sandtrap battle. The game also lacks proper (Verified) Steam Deck support because of those reasons.An unofficial patch to fix these issues can be found here at PCGW.
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Steam Deck Compatibility
 PlayableValve's testing indicates Half-Life 2: Update is Playable on Steam Deck. This game is functional on Steam Deck, but might require extra effort to interact with or configure.
Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration. This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons. Some in-game text is small and may be difficult to read.  This game's default graphics configuration performs well on Steam Deck. [ Learn more ]
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