While I agree that Titan Quest is the best alternative in the market for Diablo, nowadays, it's not fair to compare an actual full game to something that was a small project.
Torchlight is indeed a very good game, and it has some good mechanics as well. I liked the Pet mechanism, how you could change forms to suit different levels and playing styles (I love using the Ice Elemental pet)
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
