When did Dwarf Fortress come out?

Related questions

1. Is Dwarf Fortress open source?
2. Is Dwarf Fortress a game?
3. Is Dwarf Fortress a roguelike?
4. Will Dwarf Fortress be free on Steam?
5. What is a group of librarians called?
6. When did Dwarf Fortress start?
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Tags

1. #months
2. #dwarf
3. #fortress
4. #working
5. #october
6. #suspended
7. #release
8. #previous
9. #began
10. #after
11. #explained
12. #adams
13. #finish
14. #armok
15. #arcade
16. #would
17. #project
18. #first
19. #estimating
20. #order
21. #development