Grandpa is deceased, so he isn't in town as such, but he is accessible when your farm is being evaluated. Grandpa doesn't have a specific quest, but he evaluates your farm at the beginning of Year 3.

Grandpa’s Farm by Possible Worlds Games, a letter-writing tabletop role-playing game, is directly inspired by slow-paced games like Harvest Moon, Animal Crossing, and Stardew Valley. From Tyler ...