The game "Grounded" takes about 30 to 32 hours to complete the main story on average. If you include side quests and extras, it will take around 70 to 74 hours , and for completionists aiming to do everything and explore all content, it can take about 100 to 101 hours. The game's survival and exploration elements can extend playtime significantly depending on how much you explore and build. In summary:

• Main story: ~30-32 hours
• Main story + side quests: ~70-74 hours
• 100% completion: ~100-101 hours

This means if you just focus on the main objectives, it might take a bit over a day of solid play, but truly exploring and enjoying everything the game offers can extend play well beyond 100 hours.