If the file is legitimate for its name, it contains version of Rain World . This version includes:
If you want to play safely and support the devs, I'd recommend grabbing it during a Steam or GOG sale, where it often goes for a deep discount. Rain.World.v1.9.03-P2P.zip
A punishingly difficult survival platformer where you play as a "slugcat." If the file is legitimate for its name,
Since this is a P2P release, you should be extremely cautious. These files are common vectors for: Rain.World.v1.9.03-P2P.zip
Unofficial cracks often break Steamworks integration, meaning mods (via Bovine or Rain World Remix) may not work correctly, and save files can become easily corrupted.
Installer
Portable