Complex sentence: It will be the seventh 3D platformer title in the main "Super Mario" series, and will return to the more open world style of gameplay previously featured in "Super Mario 64" and "Super Mario Sunshine".
Split into simpler sentences: It will be the seventh 3D platformer title in the main "Super Mario" series. The game returns to the freeform open-world level design previously featured in "Super Mario 64" and "Super Mario Sunshine".