It’s actually a requirement that you switch between all of the islands in order to progress through Jurassic World Evolution. You need to build research centres and fossil buildings on each island in order to make progress all together.
Having multiple types of the research building for example allows you to research higher technologies and upgrades such as guest buildings. You can only switch to another island if you have unlocked it.
After starting on the first island, you need to get it to a star rating of 3 to reach the next island. Whilst getting it to star rating 4 unlocks Isla Nublar, which is the sandbox mode.
You can find our guide below for switching between islands in Jurassic World Evolution. If you want to see some more guides, check here.
Switching Between Islands
As I mentioned before, you need to unlock a different island first, so make sure you’ve done that! Head on over to the control room, it’s the top button on the left hand menu. Here you have some control over your game, as well as the park.
Select the ‘Island Navigation’ button, the second one along at the top of the screen which looks like the Jurassic World logo. It’s in here that you can choose a different island.
You can see the island that you’re currently on, with other islands that you can travel too. It will also tell you any contracts you have in progress, your reputation on that island and any available missions.
You can select any of the locked islands to see what their requirements are. You usually need to reach a certain star rating on another island to unlock them.