Before opening any .zip file, upload it to VirusTotal to scan it against dozens of antivirus engines.

Often used to bypass antivirus scanners.

Third-party "free" sites often bundle legitimate games with trojans, miners, or spyware.

Run unknown software in a virtual machine or a "sandbox" to isolate it from your main operating system.

Likely an adult-oriented visual novel or dating simulator.

If a simple game asks for full administrative control of your PC, proceed with extreme caution.