Castaway Paradise

You will first have to unlock the Meet the Villagers achievement so you can meet Harold after building his home.

You must speak to him to donate anything. Thanks to Notarzt for reminding me.

At the back of his building, there are 3 sections for; Fish, Shells and lastly bugs. Inside these rooms are 32 spaces for each section. So you only need to find just under half of each to complete the relevant achievements.

You will see the bugs easily, so approach slowly with your bug net when you get it from Gustave and you’ll soon have 15 different bugs. If you wish to store them before you meet Harold, go to your home and on the left as you enter is a storage unit.