"Highly compressed" usually means the game files have been repacked (e.g., by groups like FitGirl or DODI) to reduce the download size from several gigabytes to a much smaller file.
: Right-click the downloaded file and select "Extract to [Folder Name]" . download-quest-rooms-game-for-pc-highly-compressed
: Open the extracted folder and find setup.exe or install.exe . "Highly compressed" usually means the game files have