After each level, players can earn Extras by collecting a Red Power Brick. Characters such as Batman, Robin, The Joker, Catwoman, The Penguin, and Bane released in the toy range as well as new characters that are not in the LEGO Batman sets such as Batgirl, Mad Hatter, Clayface, Man-Bat, and Killer Moth are playable.
Batman starts in his standard black and grey suit and can wear a Heat Protection Suit, a Sonic Suit, a Glide Suit, and a Demolition Suit. Robin can wear a Tech Suit, a Water Suit, an Attract Suit, and a Magnetic Suit. When you find those suits, you may obtain them in the Suit Swappers, or play as them in free-play. Batgirl can wear the same suits as Batman, and Nightwing can wear the same suits as Robin.
As in the previous LEGO games (such as LEGO Star Wars and LEGO Indiana Jones), once a player completes a level, that level is unlocked in “Free-play Mode”. Free-play mode allows the player to replay any level they’ve completed with any characters they’ve unlocked, unlike Story Mode, which only allows players to switch between the characters involved in that scene. This permits access to areas containing extras the player was unable to get before.
A sequel, LEGO Batman 2: DC Super Heroes, was released on June 19th, 2012. It revolves around The Joker and Lex Luthor teaming up, and in turn Batman and Robin ally with Justice League members such as Superman, Wonder Woman, and Green Lantern.