You may need a tool like 7-Zip or WinRAR to open it.
Many pirated files are password-protected to hide their contents from antivirus scanners. Never input a password provided by a suspicious website, as this is a common tactic to bypass security.
Compare the file size to the official game. The legitimate version of Swag and Sorcery is roughly 500MB – 700MB . If your file is significantly smaller (e.g., <10MB), it is likely a downloader for a virus.
Build and upgrade equipment to help your heroes survive tougher levels.