GnollHack is a NetHack variant that adds to the game animated graphics, spatial sounds, and voice overs, among other things. The current, modern version is available on Android and iOS. Old versions are available on Windows and Linux.
You enter the Dungeons of Doom in hopes of recovering the Amulet of Yendor, the most powerful of all the artifacts of the gods, for your deity. The Amulet has been stolen by the cruel god Moloch and hidden in Gehennom, the Under World, where he now lurks and bides his time.