Original sentence: The antagonists are commonly characters who have betrayed the protagonist or their organization, or who has the most impact impeding their progress.The series focuses around many different protagonists who attempt to rise through the ranks of the criminal underworld, although their motives for doing so vary in each game
Edited sentence: Desmond is forced to relive his ancestors memories, who were all assassin's, in order to recover a "Piece of Eden" for Abstergo.The plotlines follow a former assassin trainee named Desmond Miles (although he does not make any appearance in Altaïr's Chronicles) as he is captured by super corporation Abstergo Industries.While the Assassin ancestor of Desmond is usually Altaïr, a few of the games feature a similar assassin named Ezio