| File Extension: | SID |
| File Type Description: | Steam Game Data Backup File |
| File Type Developer: | Valve |
| Primary Associated Software: | Steam |
| Primary Software Developer: | Valve |
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Valve developed the SID file extension, also know as a Steam Game Data Backup File file, for the Steam software package. User statistics infer that these SID files are popular with users from United States and most frequently found on the Windows 10 platform. Google Chrome is their primary internet browser for the bulk of these users.
 | Audacious by Open Source |
 | Steam by Valve |
 | ACD Systems Canvas by Microsoft Corporation |
 | SIDPlayer by Open Source |
 | quadraSID by reFX |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
 | BSD |
 | BeOS |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .CSD | Valve | Game Files | Steam Game Data Backup File |
| .MST | Corel | Settings Files | Corel Presentations Master Template File |
| .RMF | Valve | Game Files | Hammer Rich Map Format |
| .VOID | Valve | Game Files | Half-life Map Voids File |
| .SIM | Valve | Backup Files | Steam Game Backup Information File |
| .SMD | Valve | 3D Image Files | Valve Studiomdl Data File |
| .SIS | Valve | Backup Files | Steam Game Backup Information File |
| .DMP | Microsoft Corporation | System Files | Windows Memory Dump File |
| .AIN | Valve | Game Files | Source Engine Compiled AI Nodegraph File |
| .NCF | Valve | Game Files | No Cache File |
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