Complex sentence: The game is the eighth major installment in the Assassin's Creed series, and the successor to 2013's'with ties to 2014's "Assassin's Creed Rogue".
Split into simpler sentences: The game is the eighth major installment in the Assassin's Creed series, and the successor to 2013's'. It also has ties to 2014's "Assassin's Creed Rogue".