The file is a compressed archive likely containing the game files for Unrailed! , a chaotic co-op multiplayer railroad construction game.
If you'd like, I can help you find or official store links to ensure you're getting a safe version of the game. Unrailed! | Download and Buy Today - Epic Games Store Unrailed.rar
Based on standard game distributions, "Unrailed.rar" would typically contain: The file is a compressed archive likely containing