Seems like a bargain to me
Assassin's Creed IV: Black Flag -- Freedom Cry is a stand-alone episode in the Assassin's Creed universe, meaning that while the game runs on the Assassin's Creed IV engine, players will not need to own a copy of Assassin's Creed IV: Black Flag to enjoy the game.
The first expansion episode for Ubisoft's pirate adventure, Assassin's Creed IV: Black Flag -- Freedom Cry is a four-plus hour adventure of nine missions featuring a new assassin character, Edward Kenway's first mate Adewale. This episode explores what happens to Adewale fifteen years after he finds freedom from slavery onboard Kenway's ship, on his own but trained in the art of assassination.
Life..... It's just a game