Complex sentence: Defender of the Future is the fourth title in the "Ecco the Dolphin" series, released in 2000 for the Dreamcast and later in 2002 for the PlayStation 2.
Split into simpler sentences: Defender of the Future is the fourth title in the "Ecco the Dolphin" series. Released in 2000 for the Dreamcast and later in 2002 for the PlayStation 2.