Complex sentence: Square Enix president Yoichi Wada defended the game's sales, stating "Sleeping Dogs" sales had not been poor, but that the firm might have had unreasonably high expectations for the game and he saw "Sleeping Dogs" as a strong new intellectual property.
Split into simpler sentences: Square Enix president Yoichi Wada defended the game's sales, and said that the firm might have had unreasonably high expectations for the game. He saw "Sleeping Dogs" as a strong new intellectual property.