For a mind-bashing, procedural hallmark, Rogue'sh-like, ASCII art, adventure- Check out Dwarf Fortress. Trust me, you'll hate it... at first...
It's dangerous to go alone. Take this:
- Dwarf Fortress Wiki - Quickstart Guide
- The Complete and Utter Newby Tutorial For Dwarf Fortress: Part 1 - WTF
- Reddit - I want to play Dwarf Fortress, but...
Enjoy,
Jordan