Just share this Facebook status wall post:
For a chance to win a copy of Dota 2.
There are a total of 9 copies of Dota 2 to give away, so if only 9 people participates everyone gets a copy! At the moment one person participated. Need eight more!
If there are more people, then probably 9 will be chosen randomly.
It all started with the Weekly Steam Games Giveaway: