Being a .rar file, it likely contains an .iso . You will need to mount the ISO or extract it to find the Setup.exe .
The group typically releases games in a "crack-and-play" format. A report from typical scene databases like Xrel.to or SRRLOG would indicate: Protection: Steam (Removed) Date: Circa April 2020 Platform: Windows PC Safety & Security Check Spooky.Starlets.Movie.Monsters-DARKSiDERS.rar
.rar (Archive containing game files or an ISO image) Being a