The Binding of Isaac: Best Friends Forever is an expansion pack to the original Binding of Isaac game. It was released on January 8, 2015, and adds a new playable character, new items, and a new final boss. The expansion also includes a new game mode called “Greed Mode”, which is a roguelike mode where players must fight through waves of enemies in order to earn money and unlock new items.
The Binding of Isaac: Best Friends Forever has been praised for its challenging gameplay, its large amount of content, and its unique art style. The expansion has also been criticized for its difficulty, which some players have found to be too high. However, the expansion has been overall well-received by fans of the original game, and it has helped to extend the game’s lifespan.