The core gameplay of Lego Batman is similar to that of previous Lego video games, such as Lego Indiana Jones: The Original Adventures and the Lego Star Wars series.[3] The player controls any one of a wide assortment of characters from a third-person perspective, primarily fighting enemies, solving puzzles, and collecting Lego "studs", the game's form of currency. Using attack combinations in combat will multiply the amount of studs earned.[4] The game is set in Gotham City, with mainly realistic environments; only interactive objects are made of Lego bricks. Occasionally, players must assemble Lego objects to proceed further in the level, cross obstacles, or unlock new suits.[5] Players are able to fight on land, sea, and in the air, using a number of character-controlled vehicles, including the Batmobile, Batboat, and Batwing. New moves to the series first featured in Lego Indiana Jones: The Original Adventures are featured in this game. New abilities introduced in this game include picking up and carrying enemies and walking on tightropes across buildings. Up to two players can play in co-operative mode,[6] except in the PSP version which does not feature this mode.[7]
There are thirty levels in the game (divided into fifteen each for the heroes and the villains)[8] as well as two secret levels, which sees the player exploring miniature versions of the Wayne Manor and Arkham Asylum to collect studs. There are many different environments in the game, usually based upon the villains' crime styles, including an ice cream factory, a botanical garden, and the Gotham sewers. The game is divided into chapters, each containing five levels.[6] Chapters are divided equally between heroes and villains, having three chapters each.[6] Completing a hero chapter unlocks the corresponding chapter for the villains.[6] As in previous Lego video games, levels are unlocked for "Free Play" mode once they are completed in Story Mode.[6] "Free Play" allows the player to replay any level they have completed, but with any characters they have unlocked so far.[6] This permits access to special areas containing additional collectibles, where the player was unable to get to before. This is unlike Story mode, in which the player may only switch between the two characters involved in that scene.[6]