Based on your reference to HROT.v0.5.9.zip , it appears to be a specific, earlier version of the game. Typical Installation Steps for HROT
Right-click the HROT.v0.5.9.zip file and select "Extract All" or use a program like 7-Zip or WinRAR . File: HROT.v0.5.9.zip ...
Open the extracted folder and locate the main executable file (usually named hrot.exe or similar). Run the Game: Double-click the executable to start playing. Based on your reference to HROT