Lego Batman: The Videogame is a Wii and Nintendo DS game. It was released after the movie The Dark Knight was released on theaters.
Players take place in the Batcave and featuring the introduced characters, Batman and Robin. A computer will help them purchase stuff and watch movies and do more. Alfred is the non-playable switchable character in the Batcave and can only be played by buying him. Batman and Robin have types of suits and they have their vehicles. A character has to build a suit switcher to get switches. If it has a bat logo, it can only be used by Batman. If it has an R logo, it can only be used by Robin.
In Arkham Asylum, it can only be accessed after completing a chapter and the area is filled with all of the henchmen, goons and minions of the main antagonists of the episodes. The default characters they play as are the Riddler and the original Clayface.
The Riddler's Revenge
Power Crazed Penguin
The Joker's Return
Batman (Normal, Heat Immunity, Sonic, Demolition and Glide)
Robin (Normal, Attractor, Aqua, Technology and Magnet)
Nightwing (Normal, Attractor Aqua, Technology and Magnet)
Clayface (Basil Karlo)
Catwoman (Normal and Classic)
The Mad Hatter
The Joker (Normal and Tropical)
Riddler Goon and Henchman
Poison Ivy Goon
Penguin Goon and Henchman
Joker Goon and Henchman
Note: In order to unlock Hush, you must rescue a quarter of civilians and to unlock Ra's al-Ghul, you must find all of the Minikits.