Want to play Diablo 1 in HD ?

Not possible yet, but you can walk around town and go through some random dungeons
Note : You need to have the original data files to play it, and no copyrighted material is being distributed.

Source : http://www.reddit.com/r/Diablo/comments/23okhq/freeablo_a_cross_platform_foss_rewrite_of_the/

Download here : https://github.com/wheybags/freeablo/releases