Using a PC, copy the NSP files to a folder on your SD card, such as /install/aot2/. Alternatively, install over USB via NS-USBloader (faster, no double copying).
Assuming you have a Nintendo Switch with Atmosphere Custom Firmware (or similar) and a tool like Tinfoil, DBI, or Awoo Installer, here is the generalized method for installing Attack on Titan 2: Final Battle via NSP. attack on titan 2 switch nsp final battle dl install
DLC Purchase: For any additional DLC, including the final battle content: Using a PC, copy the NSP files to
Installing out of order is the #1 cause of "Software closed because an error occurred." DLC Purchase : For any additional DLC, including
Once installed: