Diablo 1 was an itch that constantly needed scratching for a LONG time.
I know the feeling. My pick for this list is the game that Diablo was derived from,
Angband. It's a randomly generated roguelike with incredible depth. If you die, it's over!! Unless you cheat with backing up your save file, which I... totally never do...
![Roll Eyes ::)](https://vgcollect.com/forum/Smileys/default/rolleyes.gif)
Once you get all the control commands down ("q" for "quaff potions", "w" for "wear/wield weapons" and so on), you'll be having a blast!
It pulls me in at least once a year. And it's free for basically every system ever made.