Some poor soul has [created a mod for Diablo 2 that re-implements Doom 2 as an isometric Diablo 2-style dungeon crawler][link]. It has been dubbed “Doomiablo.”
[link]: http://www.pcgamer.com/someone-has-finally-recreated-doom-2-in-the-diablo-2-engine/ “Someone has finally recreated Doom 2 in the Diablo 2 engine | PC Gamer”