This is a high-compression archive format. You will need a utility like 7-Zip or WinRAR to open it.
Depending on where you encountered this file, it usually serves one of two purposes: Lrpsgp2 7z 031
Indicates compatibility with the Libretro API , the foundation for the RetroArch frontend. PSGP2 / PS2: Refers to the PlayStation 2 console. This is a high-compression archive format
It could be a specific build of the PCSX2 core optimized for certain hardware (like the Steam Deck or Android devices). How to Use the File Lrpsgp2 7z 031
Based on available technical data, appears to be a specific compressed archive file (likely in 7-Zip format) related to the PCSX2 or Libretro (RetroArch) PlayStation 2 emulation ecosystem .