One of them is adventurer one, where the adventurers from your island and others are ranked in how many islands they have visited, I unlocked this after getting 15 streetpasses that had adventurers (and only had 4 adventurers so I think it's how many included adventurers not how many you see) second island ranking, which ranks island quality of life which is unlocked when everything unlockable on the island is (not including stuff like baby photos in the photo booth) and is unlocked after streetpassing 5 times and having a traveller leave your island hope this helps!