So I broke down today....

[BellaStrega]

There was a game that I can't properly recall the name of which was the predecessor of Torchlight and Mythos, but had similar elements - you had a pet, fishing, et cetera. But it also had an infinite dungeon. I remember reading tales of "deep divers" who were on level two million something (admittedly having gotten down there via skipping levels through console commands, but they had the stats to survive) which featured some ridiculously large numbers.

I believe you're referring to Fate. A couple of people who worked on that also worked on Torchlight, and I think on Mythos.