Files from unofficial sources can be risky. It is recommended to scan the archive for malware and verify the file's hash (MD5/SHA) if the source provided one.
XCI is a file format used for Nintendo Switch game cartridges. Tactics Ogre Reborn (XCI).part2.rar
Once extracted, the XCI file is typically used with Nintendo Switch emulators (like Ryujinx or Yuzu) or on modified Switch consoles. Files from unofficial sources can be risky
Tactics Ogre: Reborn , a remastered version of the classic tactical RPG. Tactics Ogre Reborn (XCI).part2.rar
.part2.rar indicates this is the second part of a multi-part RAR archive.