Why is it called DOTA 2?

Related questions

1. Does Dota 2 have skins?
2. Can I sell my Dota 2 items?
3. What programming language is DOTA 2 written in?
4. Can you sell CSGO skins for real money?
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6. What do steam items do?
7. Can you trade steam items for money?
8. How many Dota 2 players are there?
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Tags

1. #defense
2. #heroes
3. #allstars
4. #storm
5. #dispute
6. #naming
7. #however
8. #stood
9. #decided
10. #blizzard
11. #altogether
12. #known
13. #before
14. #became
15. #acronym
16. #object
17. #reference
18. #ancients
19. #former
20. #valve
21. #between
22. #obvious