File Extension Search

.acf File Extension

Developer: Valve
File type: Steam Application Cache File
You're here because you have a file that has a file extension ending in .acf. Files with the file extension .acf can only be launched by certain applications. It's possible that .acf files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .acf file?

The Valve Steam software is a program for video gaming developed by Valve, and this software uses files appended with the .acf extension, also called Steam application cache files. These ACF files are classified as data files, and the content stored in these .acf data files include details referenced and retrieved by the Valve Steam software when a user accesses associated features integrated into this program. Particularly, the data stored in these ACF files are Web locations of video game installers and other attributes of those programs. The Valve Steam application is a download management software developed by Valve for users to conveniently download, organize and manage their favorite video games. This software also populates their application databases with names and details of many video games, and this data is stored in other Valve Steam program files, to be referenced by the application when the user requests for associated content via the features integrated into the Valve Steam program. To create, open and modify the content of files with the .acf extension, users can install the Valve Steam application into their Microsoft Windows-based systems. There is also another version of Valve Steam for Mac platforms, so Mac users can install this program and implement support for .acf files.

how to open a .acf file?

Launch a .acf file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .acf file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .acf files aren't yet associated with it. In this case, when you try to open a .acf file, you can tell Windows which application is the correct one for that file. From then on, opening a  .acf file will open the correct application. Click here to fix .acf file association errors

applications that open a .acf file

Valve Steam

Valve Steam

Valve Steam is a platform for digital distribution, digital rights management, communications and multi-player. It is a product created by Valve Corporation that is designed to distribute games and other related media for online use. This software is integrated with an automatic management and install management of software across numerous computers. It also has features for socialization like the groups and friends lists, as well as cloud saving. The in-game voice and chat capabilities are added features of Steam also. Like other programs created by Valve, Steam has programming interface that is easy to use and manipulate. There is also Steamworks which is helpful in integrating different functions of Steam within their own products, which include networking, copy protection, matchmaking, micro-transaction and in-game achievements. Steam is compatible with Microsoft Windows PCs as well as Mac OS X computers and iOS devices. This product also works for some Linux operating systems.
Valve Source SDK

Valve Source SDK

Valve Source SDK is a software development kit or SDK software, which is created by Valve Software, that is designed to create mods and maps for Source engine, except for some game applications like Portal 2, Left Dead, and Alien Swarm, as they have their own SDKs already. Source SDK has four main utilities and these are to create a mod, refresh SDK content, reset and edit game configurations. In creating a mod, it dumps the code of Source engine into a folder and a mod directory is created under the folder called SourceMods. SDK content is refreshed by checking new data updates as well as downloads. Game configurations can be reset and edited too. Basic games are the basis of how game configurations are recreated, while mods in configurations are removed except if they are edited manually. There are also applications integrated in this kit software, which are Face Poser, Valve Hammer Editor or Hammer and Model Viewer.
Valve Hammer Editor

Valve Hammer Editor

Valve Hammer Editor is a map creation software for games, engines and other sources of Valve Software, This is also called as Hammer, which was more popular as Worldcraft, its original name, that is developed and launched in the year 1996. This is downloadable for any source based game that is part of source SDK or a first person shooter game. Before the Source engine, brushes, which are a set of simple primitives, were the only construction blocks in Hammer Editor, but still usable in older versions of GoldSrc games. This software saves a level life in many format types, which include in the binary and proprietary, text based or .rmf format, human readable .map format, and .vmf format, which was the default level life on version 4.0 and considered a simple file but contains complete information about a level. Furthermore, a level is pass through a program called bsp that uses brushes in order to create the architecture of a level and places entities for the location of a level file. Then, it passes through Visible Information Set or VIS processor, then through the rad program.

a word of warning

Be careful not to rename the extension on .acf files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .acf. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.
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