Lego Batman 2:DC Superheroes is the linchpin of today's Lego games, the beginning of modern Lego games. It changed the model used in the previous series and introduced a lot of new mechanics and features used in today's new games. What stands out is the full voice acting. It's the first time the characters speak, and they don't just communicate through shrugs and vague gestures. It's a big step in the right direction for the game, and comes with another big change, the game's new open world element. For the first time, you'll be able to explore your city, not just a small base with a portal. It makes the game feel bigger and gives the player more freedom.