Ensure you have part1.rar , part3.rar , etc., all in the same folder.
If extraction fails, one of the parts might have downloaded incorrectly. You may need to redownload that specific part. Grounded.v1.0.1.3912.part2.rar
If you are looking for a review of the (Grounded), it is highly regarded. It’s a survival-crafting game where you are shrunk to the size of an ant in a backyard. Ensure you have part1
What is included in SkaDate Prime?