isla nublar — the island featured in "jurassic park", "jurassic world", and "" — is the setting for a sandbox mode that is separate from the game's career mode. the sandbox mode is unlocked once a four-star park rating is achieved on isla matanceros, the starting island. once this is accomplished, everything players have unlocked in career mode, such as building upgrades and dinosaurs, will transfer over to the sandbox; anything locked in career mode remains in the sandbox. in sandbox mode, players have unlimited funds, and they can set the weather and time of day at their parks. challenge mode, available in an update after the game's release, involves playing with adjustable levels of difficulty and limited money, in addition to other differences like fees and penalties against players.