You certainly know Diablo, but not sure if you saw the isometric minimal-code style version of the game using html5 canvas and javascript ! the latest update extracted one original level from Diablo 2, you can use TAB to show map, in addition to new map layers – walls, floors, objects… and finally tools for extract levels, pictures and another resources from origin Diablo 2 files !
Diablo JS : http://mitallast.github.com/diablo-js/
Source : https://github.com/mitallast/diablo-js
