A prototype of the unreleased Batman: Arkham Asylum game for the Nintendo DS, made by Full Fat. The game was to be published by Eidos Interactive.
This prototype has only two levels: a rooftop and the library and seems to be in the intermediate stages of development, with the atmosphere and character design well defined, but the artificial intelligence completely disabled, since the enemies do not react to the presence of the hero or the blows he takes.
In addition, the functionality seemed incomplete, being possible to see a utility belt in the bottom corner of the screen, for example, but totally unable to select the Dark Knight's gadgets. Despite this, all the controls are functional, with adequate mapping on the DS buttons and on the touch screen.