Valve's Free to Play Dota 2 documentary available now - GameSpot

After being in production for a number of years, Valve's "Free to Play" Dota 2 documentary is now available on Steam, and iTunes.
Dota 2 features the characters and factions from the original Defense of the Ancients title with new features.

Dota 2 - Review by Gamespot : r/DotA2

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Dota 2's Free to Play documentary takes you back in time

Valve presents The International 2012 documentary : r/DotA2

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Snapfire got cosmetic items in underlords before dota : r/DotA2

Artifact - Metacritic