Microsoft Agent HTTP Character Format
Valve
Ads

File with an .ACF extension contains data of cache memory of Steam Valve application – information on downloaded software and its updates. Previous Steam versions used for this purpose files with .GCF and .NCF extension.

Steam application is used to download different types of software, mainly games and their updates. It is also a social network platform and it enables multiplayer game mode. It is available for most of modern operating systems and devices.

Windows
Mac OS

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Last updated

.mmf 04/13/2023
.mup 04/13/2023
.itl 04/13/2023
.scs 04/10/2023
.crypt 04/10/2023
.pnp 04/10/2023
.tap 04/10/2023
.btr 04/03/2023