Complex sentence: It became the most expensive game ever developed at the time, reported to have cost Sega $70 million; in 2011, Suzuki said the figure was closer to $47 million including marketing.
Split into simpler sentences: It became the most expensive game ever developed at the time, reported to have cost Sega $70 million. In 2011, Suzuki said the figure was closer to $47 million including marketing.