The file appears to be a compressed archive related to a fan-made game or modification, likely associated with the Biohazard (Resident Evil) series or a similarly named indie project.
Based on common usage for files with this naming convention, here are the likely details regarding this file: BioasshardArena.rar
: Since files like this often circulate on community forums or third-party hosting sites, you should always scan them with updated antivirus software before opening the contents. The file appears to be a compressed archive