To access the contents of , you need a file archiver that supports the 7z format: 7-Zip : The official, free, open-source tool for Windows.

: This specific archive is frequently found in fan-translation forums (e.g., Arcane Coast ) where it contains updated or translated game dialogue.

or WinRAR : Commercial alternatives that can extract 7z archives.

Are you trying to install a for a specific game, or do you need help extracting the contents?