How to Open, Edit, and Convert FORGE Files

Screenshot of several FORGE files

Tim Fisher 

A file with the FORGE file extension is an Assassin's Creed Game Data file used in the Assassin's Creed video game.

The FORGE file is a container format that may hold sounds, 3D models, textures, and other things used by the game. They're typically pretty large in size, usually over 200 MB.

Note: This article is about the FORGE file format, not the Minecraft Forge modding API.

How to Open a FORGE File

FORGE files are produced by Ubisoft's Assassin's Creed and are not meant to be opened manually by you, but instead used by the game itself. Some FORGE files might be used with Prince of Persia too.

However, there is a small, portable tool for Windows called Maki that can open FORGE files. It should be able to extract some or all of the different components that make up the FORGE file. You'll need a program like 7-Zip to open the RAR archive that Maki is saved within.

Tip: If you're having troubles with a specific FORGE file, it's best to either reinstall the game or, if you're Steam, to validate the game files in an effort to replace the broken or missing FORGE file.

Although we don't have a FORGE file to test this, it's possible you can just use a free file extractor to open it — our favorites are 7-Zip and PeaZip. However, because those programs don't recognize the FORGE format by default, instead of just double-clicking on the FORGE file and expecting it to open, you'll have to open one of those file extractors first and then browse for the FORGE file from within the program.

Tip: It's possible the FORGE file you have has nothing to do with videos games like Assassin's Creed but is saved in an entirely different format. We recommend using a free text editor in these situations so that you can see the contents of the file as just text. You can sometimes find a word or two within the text file that explains what format it's in or what program created it.

In a sort of opposite situation, you may find that you have more than one program installed that supports FORGE files and one is the default... the one you don't want to be. Changing which program is the default "open" program for files that use the FORGE extension is pretty straightforward. See how to change file associations in Windows for detailed instructions.

How to Convert a FORGE File

Popular file formats can usually be converted to other formats using a free file converter, but we don't know of any dedicated converters meant especially for FORGE files. Plus, our understanding of this format is that it shouldn't exist in any other except the one it's currently in, for no other program should have any use for these files but Assassin's Creed.

However, if there is any program that can convert the FORGE file, it's most likely the Maki program mentioned above. Otherwise, the program that opens a file is normally capable of saving it to a different format, but it's unlikely the Assassin's Creed game itself has such a capability.