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Viewing and Extracting Game Assets with FModel

FModel is a powerful UE4/5 asset viewer and unpacker. In my opinion, its importance in modding comes second only to UE4SS. For R-Type Final 2, both the AES key and .usmap mapping files are required to unpack assets properly.

Selecting the Directory

  1. Open FModel and click Settings in the top menu.
  2. Configure the following two settings:
    • Archive Directory: Set this to the RTypeFinal2 folder inside the game directory.
      (Example: D:\Program Files (x86)\Steam\steamapps\common\R-Type Final 2\RTypeFinal2)
    • UE_Versions: Select GAME_UE4_26
  3. Click OK to save the changes.

If set up correctly, you should see the game's .pak files listed on the left. However, they will still appear gray, which means they are encrypted and cannot yet be unpacked.

Currently, the Directory -> Selector option in FModel’s menu seems to offer automatic game detection and setup—it might be worth trying.

Loading the AES Key

  1. Open the top menu Directory -> AES.
  2. Try the AES keys exported using AESKeyFinder, one by one.
  3. Once the correct key is entered, the .pak filenames on the left will turn from gray to white, indicating successful decryption.

At this point, you can start unpacking the basic content. Change the Loading Mode to ALL, click Load, then switch to the Folders tab. You will see the game's assets and directory structure. However, previewing or exporting will still result in errors at this stage.

Loading the .usmap Mapping Files

  1. Click Settings from the menu.
  2. In the ADVANCED section, check the Local Mapping File option.
  3. Set the Mapping File Path to the location where you exported the .usmap files earlier.

You should now be able to preview and extract assets without issues.