A phy file suffix is associated with the Valve Source game engine. A phy file stores collision model data.
There are 4 other file types using
the PHY file extension!
.phy - Spicemod asic data
.phy - 3ds Max physique model
.phy - PhyMod physical modeling data
.phy - PHYLIP data
What is phy file? How to open phy files?
The phy file extension is related to the Valve Source, a video gaming engine and development tool used to develop video games for various platforms.
The phy file contains collision model data.
The default software associated to open phy file:
Source SDK 
Company or developer:
Valve Corporation
Source SDK is free development environment used to create mods and content for the Source 2006, Source 2007 and Source 2009 engine branches and related video games, like Half-Life 2, Dota 2, Team Fortress 2, Left 4 Dead, Portal, etc.
Help how to open:
Use Valve Source SDK to work with *.phy files.
How to convert:
As far as we know, this .phy file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of software applications associated to the .phy file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open phy file, edit phy file, convert phy file, view phy file, play phy file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting phy files.
Software that open phy file - Valve Source collision model data
Programs supporting the exension phy on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Source SDK for open phy file action.
Programs that can create phy file - Valve Source collision model data
Programs supporting the exension phy on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Source SDK for create phy file action.
Unspecified and all other actions for computer programs working with phy file - Valve Source collision model data
Click on the software link for more information about Source SDK. Source SDK uses phy file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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