I only think I would need one thing from this list the most and two not from this list.
From the list: Loading and saving your game.
Not from the list: Multiple playing characters like Maniac Mansion. Also, integration with Character Creator 2D on the asset store.
EDIT: Scratch that. Seems that multiple playable characters is possible. Just saw the function in the manual. I was looking under character rather than Engine. But engine makes more sense.