Hotel_renovator-flt.part4.rar
To open these files, you generally need to have all parts (part1, part2, part3, etc.) in the same folder. Right-click on part1.rar and select "Extract Here" using software like 7-Zip or WinRAR . These programs will automatically pull data from part4 and all other volumes to recreate the full game installer.
If you are getting a "Checksum error" specifically on part4, it means that part was corrupted during the download. You don't need to redownload the whole game—just delete and redownload that specific part4 file. Hotel_Renovator-FLT.part4.rar
You can unlock the Hammer tool for demolition after finishing room 107 [11]. To open these files, you generally need to
