Steam

Same, I got it for 2.50 in 2012 and I've played around 500 hours. It's surprising the amount of content they've added to the game over the years.

I still remember the surprise I got when I found out there was a boss battle at the underworld, and beating it unlocked even more and better stuff. At that point I think the last bosses you could fight were the mechanical bosses and the best armor was the Hallowed set.