Dota 2's annual crowdfunding drive has $15M in stretch goals

It's that time of the year again, time to start preparing for the massive Dota 2 tournament The International and time to pick up a copy of the part crowdfunding, part fan mag, part gift-giving compendium for the event.

Every year, Valve puts together a digital compendium for The International. The compendium, which sells for $9.99. The digital compendium helps players and fans from around the world celebrate the tournament, but perhaps more importantly it also fuels the prize pool for the finals and gives away a lot of neat little Dota 2 rewards.

Rewards are unlocked in two ways: through stretch goals and by leveling up your compendium through play. Stretch goal unlockables include loading screens, emoticons, music and announcer packs, special couriers and, if the compendium brings in $15 million, a special Axe Immortal and Longform comic.

The compendium just went live last night and is already at nearly $2 million. Sixteen teams are expected to participate in The International 2015, which runs form Aug. 3 to Aug. 8.

What is the Dota 2 compendium?