hello rodrigo,
i have asked many people but no one was able to tell me if garena is supporting dota 2 or not.
but i am sure that if garena doesnt suport dota 2....garena will be half doomed.all the dota players will be shifting to dota 2 and if garena doesnt support it they will probably shift from garena to an other server.
suggestion : support dota 2 on garena.

