Complex sentence: In November, 2003, Sierra "released', based on" Vivendi Universals license to Tolkien's literary works, followed up with the "Atari" published "Dungeons & Dragons" PC game "Dragonshard" in October of 2005.
Split into simpler sentences: In November, 2003, Sierra "released', based on" Vivendi Universals license to Tolkien's literary works. Followed up with the "Atari" published "Dungeons & Dragons" PC game "Dragonshard" in October of 2005.