If Diablo is what floats your boat, then this will most definitely light your torch.

Get torchlight 1 and 2 :) must have for diablo-like fans

A decent pre-quel to TL2 that's rough around the edges. Due to this game's age, some aspects and mechanics are a bit dated and archaic, which require some patience to get used to if you decide to pick this game up. I recommend this game despite it's downsides, as it's a fun and addicting dungeon crawler, all three classes are fun and have their own tools of death contained in their own skill trees, though their not the most complex ARPG skill trees, they fun to experiment with and can lead to some varying results. Make sure you're properly prepared for the final boss though, he can be a serious pain in the neck.