Prince of Persia
Assassin's Creed - Did You Know Gaming? Feat. Jake of Vsauce3
Although Ubisoft now owns the rights to the "Prince of Persia" name, the original IP rights are still owned by Jordan Mechner, the developer of the first game. This means that should Ubisoft want to make a new "Prince of Persia" game, they must ask Jordan Mechner's for the right to do so.
Contributed by gamemaster1991