To open and develop content from a .7z file, you will need a file archiver:

: Modders often use .7z to share entity.json files, which are converted from game-specific TEMP or TBLU files to create custom content.

: The official, free, open-source tool for this format. You can download it at the official 7-Zip website .

If this file is intended for development or modding, it likely contains:

If you are looking for official game content, note that has been rebranded as Hitman: World of Assassination . This version includes all locations and content from Hitman 1 and 2 for free.