Complex sentence: The gameplay is based on the rules of the "Dungeons & Dragons" 3rd Edition, which were released in 2000, and it is the first video game to implement the real time application of the new rules.
Split into simpler sentences: The gameplay is based on the rules of "Dungeons & Dragons" 3rd Edition, which were released in 2000. It is the first video game to implement the real time application of the new rules.